fix(transform): remove blob compat CTE from stg_tennis_courts

The overpass_tennis extractor has written JSONL-only since it was added.
The dual-format UNION ALL was backwards-compat debt that broke the
transform once no courts.json.gz files exist on the server:

  IO Error: No files found that match the pattern
  "data/landing/overpass_tennis/*/*/courts.json.gz"

Remove blob_elements CTE and the UNION ALL. Only read JSONL.

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

transform/sqlmesh_padelnomics/models/staging/stg_tennis_courts.sql

@@ -2,12 +2,9 @@
 -- Used as a "racket sport culture" signal in the opportunity score:
 -- areas with high tennis court density are prime padel adoption markets.
 --
--- Supports two landing formats (UNION ALL during migration):
---   New: courts.jsonl.gz — one OSM element per line; nodes have lat/lon directly,
+-- Source: data/landing/overpass_tennis/{year}/{month}/courts.jsonl.gz
+-- Format: one OSM element per line; nodes have lat/lon directly,
 --         ways/relations have center.lat/center.lon (Overpass out center)
---   Old: courts.json.gz  — {"elements": [...]} blob (UNNEST required)
---
--- Source: data/landing/overpass_tennis/{year}/{month}/courts.{jsonl,json}.gz
 
 MODEL (
   name staging.stg_tennis_courts,
@@ -17,8 +14,7 @@ MODEL (
 );
 
 WITH
--- New format: one OSM element per JSONL line
-jsonl_elements AS (
+parsed AS (
   SELECT
     type                                                          AS osm_type,
     TRY_CAST(id AS BIGINT)                                        AS osm_id,
@@ -47,33 +43,6 @@ jsonl_elements AS (
   )
   WHERE type IS NOT NULL
 ),
--- Old format: {"elements": [...]} blob — kept for transition
-blob_elements AS (
-  SELECT
-    elem ->> 'type'                     AS osm_type,
-    (elem ->> 'id')::BIGINT             AS osm_id,
-    TRY_CAST(elem ->> 'lat' AS DOUBLE)  AS lat,
-    TRY_CAST(elem ->> 'lon' AS DOUBLE)  AS lon,
-    elem -> 'tags' ->> 'name'           AS name,
-    elem -> 'tags' ->> 'addr:country'   AS country_code,
-    elem -> 'tags' ->> 'addr:city'      AS city_tag,
-    filename                            AS source_file,
-    CURRENT_DATE                        AS extracted_date
-  FROM (
-    SELECT UNNEST(elements) AS elem, filename
-    FROM read_json(
-      @LANDING_DIR || '/overpass_tennis/*/*/courts.json.gz',
-      format = 'auto',
-      filename = true
-    )
-  )
-  WHERE (elem ->> 'type') IS NOT NULL
-),
-parsed AS (
-  SELECT * FROM jsonl_elements
-  UNION ALL
-  SELECT * FROM blob_elements
-),
 deduped AS (
   SELECT *,
     ROW_NUMBER() OVER (PARTITION BY osm_id ORDER BY extracted_date DESC) AS rn