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>

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 (