refactor(serving): replace old models with location_profiles

Delete city_market_profile.sql and location_opportunity_profile.sql.
Update downstream models (planner_defaults, pseo_city_costs_de,
pseo_city_pricing) to read from location_profiles instead.

Subtask 2/5: delete old models + update downstream SQL.

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

transform/sqlmesh_padelnomics/models/serving/planner_defaults.sql

@@ -76,11 +76,12 @@ city_profiles AS (
     city_slug,
     country_code,
     city_name,
-    padel_venue_count,
+    city_padel_venue_count AS padel_venue_count,
     population,
     market_score,
-    venues_per_100k
-  FROM serving.city_market_profile
+    city_venues_per_100k AS venues_per_100k
+  FROM serving.location_profiles
+  WHERE city_slug IS NOT NULL
 )
 SELECT
   cp.city_slug,