fix(transform): remove blob CTE from stg_population_geonames

Server has cities_global.jsonl.gz (JSONL), not cities_global.json.gz (blob).
TigerStyle clean break — removed blob_rows CTE and UNION ALL.
Simplified to a single SELECT directly from read_json.

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

transform/sqlmesh_padelnomics/models/staging/stg_population_geonames.sql

@@ -3,11 +3,7 @@
 -- Broad coverage (140K+ locations) enables Gemeinde-level market intelligence.
 -- One row per geoname_id (GeoNames stable numeric identifier).
 --
--- Supports two landing formats (UNION ALL during migration):
---   New: cities_global.jsonl.gz — one city per line, columns directly accessible
---   Old: cities_global.json.gz  — {"rows": [...]} blob (UNNEST required)
---
--- Source: data/landing/geonames/{year}/{month}/cities_global.{jsonl,json}.gz
+-- Source: data/landing/geonames/{year}/{month}/cities_global.jsonl.gz
 
 MODEL (
   name staging.stg_population_geonames,
@@ -16,21 +12,18 @@ MODEL (
   grain geoname_id
 );
 
-WITH
--- New format: one city per JSONL line
-jsonl_rows AS (
-  SELECT
+SELECT
   TRY_CAST(geoname_id  AS INTEGER)  AS geoname_id,
-    city_name,
-    country_code,
+  TRIM(city_name)                   AS city_name,
+  UPPER(country_code)               AS country_code,
   TRY_CAST(lat         AS DOUBLE)   AS lat,
   TRY_CAST(lon         AS DOUBLE)   AS lon,
-    admin1_code,
-    admin2_code,
+  NULLIF(TRIM(admin1_code), '')     AS admin1_code,
+  NULLIF(TRIM(admin2_code), '')     AS admin2_code,
   TRY_CAST(population  AS BIGINT)   AS population,
   TRY_CAST(ref_year    AS INTEGER)  AS ref_year,
   CURRENT_DATE                      AS extracted_date
-  FROM read_json(
+FROM read_json(
   @LANDING_DIR || '/geonames/*/*/cities_global.jsonl.gz',
   format = 'newline_delimited',
   columns = {
@@ -38,52 +31,10 @@ jsonl_rows AS (
     lat: 'DOUBLE', lon: 'DOUBLE', admin1_code: 'VARCHAR', admin2_code: 'VARCHAR',
     population: 'BIGINT', ref_year: 'INTEGER'
   }
-  )
-  WHERE geoname_id IS NOT NULL
-),
--- Old format: {"rows": [...]} blob — kept for transition
-blob_rows AS (
-  SELECT
-    TRY_CAST(row ->> 'geoname_id'  AS INTEGER)  AS geoname_id,
-    row ->> 'city_name'                          AS city_name,
-    row ->> 'country_code'                       AS country_code,
-    TRY_CAST(row ->> 'lat'         AS DOUBLE)    AS lat,
-    TRY_CAST(row ->> 'lon'         AS DOUBLE)    AS lon,
-    row ->> 'admin1_code'                        AS admin1_code,
-    row ->> 'admin2_code'                        AS admin2_code,
-    TRY_CAST(row ->> 'population'  AS BIGINT)    AS population,
-    TRY_CAST(row ->> 'ref_year'    AS INTEGER)   AS ref_year,
-    CURRENT_DATE                                 AS extracted_date
-  FROM (
-    SELECT UNNEST(rows) AS row
-    FROM read_json(
-      @LANDING_DIR || '/geonames/*/*/cities_global.json.gz',
-      auto_detect = true,
-      maximum_object_size = 40000000
-    )
-  )
-  WHERE (row ->> 'geoname_id') IS NOT NULL
-),
-all_rows AS (
-  SELECT * FROM jsonl_rows
-  UNION ALL
-  SELECT * FROM blob_rows
 )
-SELECT
-  geoname_id,
-  TRIM(city_name)                AS city_name,
-  UPPER(country_code)            AS country_code,
-  lat,
-  lon,
-  NULLIF(TRIM(admin1_code), '')  AS admin1_code,
-  NULLIF(TRIM(admin2_code), '')  AS admin2_code,
-  population,
-  ref_year,
-  extracted_date
-FROM all_rows
-WHERE population IS NOT NULL
+WHERE geoname_id IS NOT NULL
+  AND population IS NOT NULL
   AND population > 0
-  AND geoname_id IS NOT NULL
   AND city_name IS NOT NULL
   AND lat IS NOT NULL
   AND lon IS NOT NULL