feat(extract): convert playtomic_availability to JSONL output

- availability_{date}.jsonl.gz replaces .json.gz for morning snapshots
- Each JSONL line = one venue object with date + captured_at_utc injected
- Eliminates in-memory consolidation: working.jsonl IS the final file
  (compress_jsonl_atomic at end instead of write_gzip_atomic blob)
- Crash recovery unchanged: working.jsonl accumulates via flush_partial_batch
- _load_morning_availability tries .jsonl.gz first, falls back to .json.gz
- Skip check covers both formats during transition
- Recheck files stay blob format (small, infrequent)

stg_playtomic_availability: UNION ALL transition (morning_jsonl + morning_blob + recheck_blob)
  - morning_jsonl: read_json JSONL, tenant_id direct column, no outer UNNEST
  - morning_blob / recheck_blob: subquery + LATERAL UNNEST (unchanged semantics)
  - All three produce (snapshot_date, captured_at_utc, snapshot_type, recheck_hour, tenant_id, slots_json)
  - Downstream raw_resources / raw_slots CTEs unchanged

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

extract/padelnomics_extract/src/padelnomics_extract/playtomic_availability.py

@@ -16,7 +16,7 @@ records (a few seconds of work with 10 workers) are lost on crash.
 Recheck mode: re-queries venues with slots starting within the next 90 minutes.
 Writes a separate recheck file for more accurate occupancy measurement.
 
-Landing: {LANDING_DIR}/playtomic/{year}/{month}/availability_{date}.json.gz
+Landing: {LANDING_DIR}/playtomic/{year}/{month}/availability_{date}.jsonl.gz
 Recheck: {LANDING_DIR}/playtomic/{year}/{month}/availability_{date}_recheck_{HH}.json.gz
 """
 
@@ -34,7 +34,13 @@ import niquests
 
 from ._shared import HTTP_TIMEOUT_SECONDS, USER_AGENT, run_extractor, setup_logging
 from .proxy import load_fallback_proxy_urls, load_proxy_urls, make_tiered_cycler
-from .utils import flush_partial_batch, landing_path, load_partial_results, write_gzip_atomic
+from .utils import (
+    compress_jsonl_atomic,
+    flush_partial_batch,
+    landing_path,
+    load_partial_results,
+    write_gzip_atomic,
+)
 
 logger = setup_logging("padelnomics.extract.playtomic_availability")
 
@@ -273,14 +279,14 @@ def extract(
 
     year, month = year_month.split("/")
     dest_dir = landing_path(landing_dir, "playtomic", year, month)
-    dest = dest_dir / f"availability_{target_date}.json.gz"
-
-    if dest.exists():
-        logger.info("Already have %s — skipping", dest)
+    dest = dest_dir / f"availability_{target_date}.jsonl.gz"
+    old_blob = dest_dir / f"availability_{target_date}.json.gz"
+    if dest.exists() or old_blob.exists():
+        logger.info("Already have availability for %s — skipping", target_date)
         return {"files_written": 0, "files_skipped": 1, "bytes_written": 0}
 
-    # Crash resumption: load already-fetched venues from partial file
-    partial_path = dest.with_suffix(".partial.jsonl")
+    # Crash resumption: load already-fetched venues from working file
+    partial_path = dest_dir / f"availability_{target_date}.working.jsonl"
     prior_results, already_done = load_partial_results(partial_path, id_key="tenant_id")
     if already_done:
         logger.info("Resuming: %d venues already fetched from partial file", len(already_done))
@@ -297,7 +303,10 @@ def extract(
     start_min_str = start_min.strftime("%Y-%m-%dT%H:%M:%S")
     start_max_str = start_max.strftime("%Y-%m-%dT%H:%M:%S")
 
-    # Partial file for incremental crash-safe progress
+    # Timestamp stamped into every JSONL line — computed once before the fetch loop.
+    captured_at = datetime.now(UTC).strftime("%Y-%m-%dT%H:%M:%SZ")
+
+    # Working file for incremental crash-safe progress (IS the final file).
     partial_file = open(partial_path, "a")  # noqa: SIM115
     partial_lock = threading.Lock()
     pending_batch: list[dict] = []
@@ -305,6 +314,9 @@ def extract(
     def _on_result(result: dict) -> None:
         # Called inside _fetch_venues_parallel's lock — no additional locking needed.
         # In serial mode, called single-threaded — also safe without extra locking.
+        # Inject date + captured_at so every JSONL line is self-contained.
+        result["date"] = target_date
+        result["captured_at_utc"] = captured_at
         pending_batch.append(result)
         if len(pending_batch) >= PARTIAL_FLUSH_SIZE:
             flush_partial_batch(partial_file, partial_lock, pending_batch)
@@ -348,24 +360,13 @@ def extract(
         pending_batch.clear()
     partial_file.close()
 
-    # Consolidate prior (resumed) + new results into final file
-    venues_data = prior_results + new_venues_data
-    captured_at = datetime.now(UTC).strftime("%Y-%m-%dT%H:%M:%SZ")
-    payload = json.dumps({
-        "date": target_date,
-        "captured_at_utc": captured_at,
-        "venue_count": len(venues_data),
-        "venues_errored": venues_errored,
-        "venues": venues_data,
-    }).encode()
-
-    bytes_written = write_gzip_atomic(dest, payload)
-    if partial_path.exists():
-        partial_path.unlink()
+    # Working file IS the output — compress atomically (deletes source).
+    total_venues = len(prior_results) + len(new_venues_data)
+    bytes_written = compress_jsonl_atomic(partial_path, dest)
 
     logger.info(
         "%d venues scraped (%d errors) -> %s (%s bytes)",
-        len(venues_data), venues_errored, dest, f"{bytes_written:,}",
+        total_venues, venues_errored, dest, f"{bytes_written:,}",
     )
 
     return {
@@ -380,14 +381,36 @@ def extract(
 # Recheck mode — re-query venues with upcoming slots for accurate occupancy
 # ---------------------------------------------------------------------------
 
+def _read_availability_jsonl(path: Path) -> dict:
+    """Read a JSONL availability file into the blob dict format recheck expects."""
+    venues = []
+    date_val = captured_at = None
+    with gzip.open(path, "rt") as f:
+        for line in f:
+            line = line.strip()
+            if not line:
+                continue
+            try:
+                record = json.loads(line)
+            except json.JSONDecodeError:
+                break  # truncated last line on crash
+            if date_val is None:
+                date_val = record.get("date")
+                captured_at = record.get("captured_at_utc")
+            venues.append(record)
+    return {"date": date_val, "captured_at_utc": captured_at, "venues": venues}
+
+
 def _load_morning_availability(landing_dir: Path, target_date: str) -> dict | None:
-    """Load today's morning availability file. Returns parsed JSON or None."""
+    """Load today's morning availability file (JSONL or blob). Returns dict or None."""
     playtomic_dir = landing_dir / "playtomic"
-    # Search across year/month dirs for the target date
+    # Try JSONL first (new format), fall back to blob (old format)
+    matches = list(playtomic_dir.glob(f"*/*/availability_{target_date}.jsonl.gz"))
+    if matches:
+        return _read_availability_jsonl(matches[0])
     matches = list(playtomic_dir.glob(f"*/*/availability_{target_date}.json.gz"))
     if not matches:
         return None
-
     with gzip.open(matches[0], "rb") as f:
         return json.loads(f.read())
 

transform/sqlmesh_padelnomics/models/staging/stg_playtomic_availability.sql

@@ -3,12 +3,17 @@
 -- "Available" = the slot was NOT booked at capture time. Missing slots = booked.
 --
 -- Reads BOTH morning snapshots and recheck files:
---   Morning:  availability_{date}.json.gz           → snapshot_type = 'morning'
---   Recheck:  availability_{date}_recheck_{HH}.json.gz → snapshot_type = 'recheck'
+--   Morning (new):  availability_{date}.jsonl.gz           → snapshot_type = 'morning'
+--   Morning (old):  availability_{date}.json.gz            → snapshot_type = 'morning'
+--   Recheck:        availability_{date}_recheck_{HH}.json.gz → snapshot_type = 'recheck'
 --
 -- Only 60-min duration slots are kept (canonical hourly rate + occupancy unit).
 -- Price parsed from strings like "14.56 EUR" or "48 GBP".
 --
+-- Supports two morning landing formats (UNION ALL during migration):
+--   New: availability_{date}.jsonl.gz — one venue per line, columns: tenant_id, slots, date, captured_at_utc
+--   Old: availability_{date}.json.gz  — {"date":..., "venues": [...]} blob (UNNEST required)
+--
 -- Requires: at least one availability file in the landing zone.
 -- A seed file (data/landing/playtomic/1970/01/availability_1970-01-01.json.gz)
 -- with empty venues[] ensures this model runs before real data arrives.
@@ -20,77 +25,105 @@ MODEL (
   grain (snapshot_date, tenant_id, resource_id, slot_start_time, snapshot_type, captured_at_utc)
 );
 
--- Morning snapshots (filename does NOT contain '_recheck_')
-WITH morning_files AS (
+WITH
+-- New format: one venue per JSONL line — no outer UNNEST needed
+morning_jsonl AS (
   SELECT
-    *,
-    'morning' AS snapshot_type,
-    NULL::INTEGER AS recheck_hour
+    date                             AS snapshot_date,
+    captured_at_utc,
+    'morning'                        AS snapshot_type,
+    NULL::INTEGER                    AS recheck_hour,
+    tenant_id,
+    slots                            AS slots_json
   FROM read_json(
-    @LANDING_DIR || '/playtomic/*/*/availability_*.json.gz',
-    format = 'auto',
+    @LANDING_DIR || '/playtomic/*/*/availability_*.jsonl.gz',
+    format = 'newline_delimited',
     columns = {
       date: 'VARCHAR',
       captured_at_utc: 'VARCHAR',
-      venues: 'JSON[]'
+      tenant_id: 'VARCHAR',
+      slots: 'JSON'
     },
-    filename = true,
-    maximum_object_size = 134217728  -- 128 MB; daily files grow with venue count
+    filename = true
   )
   WHERE filename NOT LIKE '%_recheck_%'
-    AND venues IS NOT NULL
-    AND json_array_length(venues) > 0
+    AND tenant_id IS NOT NULL
 ),
--- Recheck snapshots (filename contains '_recheck_')
--- Use TRY_CAST on a regex-extracted hour to get the recheck_hour.
--- If no recheck files exist yet, this CTE produces zero rows (safe).
-recheck_files AS (
+-- Old format: {"date":..., "venues": [...]} blob — kept for transition
+morning_blob AS (
   SELECT
-    *,
-    'recheck' AS snapshot_type,
-    TRY_CAST(
-      regexp_extract(filename, '_recheck_(\d+)', 1) AS INTEGER
-    ) AS recheck_hour
-  FROM read_json(
-    @LANDING_DIR || '/playtomic/*/*/availability_*_recheck_*.json.gz',
-    format = 'auto',
-    columns = {
-      date: 'VARCHAR',
-      captured_at_utc: 'VARCHAR',
-      venues: 'JSON[]'
-    },
-    filename = true,
-    maximum_object_size = 134217728  -- 128 MB; matches morning snapshot limit
-  )
-  WHERE venues IS NOT NULL
-    AND json_array_length(venues) > 0
-),
-all_files AS (
-  SELECT date, captured_at_utc, venues, snapshot_type, recheck_hour FROM morning_files
-  UNION ALL
-  SELECT date, captured_at_utc, venues, snapshot_type, recheck_hour FROM recheck_files
-),
-raw_venues AS (
-  SELECT
-    af.date                                            AS snapshot_date,
+    af.date                          AS snapshot_date,
     af.captured_at_utc,
-    af.snapshot_type,
-    af.recheck_hour,
-    venue_json
-  FROM all_files af,
+    'morning'                        AS snapshot_type,
+    NULL::INTEGER                    AS recheck_hour,
+    venue_json ->> 'tenant_id'       AS tenant_id,
+    venue_json -> 'slots'            AS slots_json
+  FROM (
+    SELECT date, captured_at_utc, venues
+    FROM read_json(
+      @LANDING_DIR || '/playtomic/*/*/availability_*.json.gz',
+      format = 'auto',
+      columns = {
+        date: 'VARCHAR',
+        captured_at_utc: 'VARCHAR',
+        venues: 'JSON[]'
+      },
+      filename = true,
+      maximum_object_size = 134217728  -- 128 MB; daily files grow with venue count
+    )
+    WHERE filename NOT LIKE '%_recheck_%'
+      AND venues IS NOT NULL
+      AND json_array_length(venues) > 0
+  ) af,
   LATERAL UNNEST(af.venues) AS t(venue_json)
 ),
+-- Recheck snapshots (blob format only — small files, no JSONL conversion needed)
+recheck_blob AS (
+  SELECT
+    rf.date                          AS snapshot_date,
+    rf.captured_at_utc,
+    'recheck'                        AS snapshot_type,
+    TRY_CAST(
+      regexp_extract(rf.filename, '_recheck_(\d+)', 1) AS INTEGER
+    )                                AS recheck_hour,
+    venue_json ->> 'tenant_id'       AS tenant_id,
+    venue_json -> 'slots'            AS slots_json
+  FROM (
+    SELECT date, captured_at_utc, venues, filename
+    FROM read_json(
+      @LANDING_DIR || '/playtomic/*/*/availability_*_recheck_*.json.gz',
+      format = 'auto',
+      columns = {
+        date: 'VARCHAR',
+        captured_at_utc: 'VARCHAR',
+        venues: 'JSON[]'
+      },
+      filename = true,
+      maximum_object_size = 134217728  -- 128 MB; matches morning snapshot limit
+    )
+    WHERE venues IS NOT NULL
+      AND json_array_length(venues) > 0
+  ) rf,
+  LATERAL UNNEST(rf.venues) AS t(venue_json)
+),
+all_venues AS (
+  SELECT * FROM morning_jsonl
+  UNION ALL
+  SELECT * FROM morning_blob
+  UNION ALL
+  SELECT * FROM recheck_blob
+),
 raw_resources AS (
   SELECT
-    rv.snapshot_date,
-    rv.captured_at_utc,
-    rv.snapshot_type,
-    rv.recheck_hour,
-    rv.venue_json ->> 'tenant_id'                      AS tenant_id,
+    av.snapshot_date,
+    av.captured_at_utc,
+    av.snapshot_type,
+    av.recheck_hour,
+    av.tenant_id,
     resource_json
-  FROM raw_venues rv,
+  FROM all_venues av,
   LATERAL UNNEST(
-    from_json(rv.venue_json -> 'slots', '["JSON"]')
+    from_json(av.slots_json, '["JSON"]')
   ) AS t(resource_json)
 ),
 raw_slots AS (