fix(data): filter non-Latin city names + score range clamp (Phase F)

- stg_population_geonames: reject CJK/Cyrillic/Arabic city names via regex
  (fixes "Seelow" showing Japanese characters on map)
- dim_locations: filter empty location names after trim
- location_profiles: defensive LEAST/GREATEST clamp on both scores (0-100)

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

transform/sqlmesh_padelnomics/models/foundation/dim_locations.sql

@@ -48,6 +48,7 @@ locations AS (
     ref_year
   FROM staging.stg_population_geonames
   WHERE lat IS NOT NULL AND lon IS NOT NULL
+    AND LENGTH(TRIM(city_name)) > 0
 ),
 -- ── EU NUTS-2 income via spatial join ──────────────────────────────────────
 -- Each EU location's (lon, lat) is matched against NUTS-2 boundary polygons.