feat: migrate transform to 3-layer architecture with per-layer schemas

Remove raw/ layer — staging models now read landing JSON directly.
Rename all model schemas from padelnomics.* to staging.*/foundation.*/serving.*.
Web app queries updated to serving.planner_defaults via SERVING_DUCKDB_PATH.
Supervisor gets daily sleep interval between pipeline runs.

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

transform/sqlmesh_padelnomics/models/foundation/dim_venues.sql

@@ -4,7 +4,7 @@
 -- Proximity dedup uses haversine approximation: 1 degree lat ≈ 111 km.
 
 MODEL (
-  name padelnomics.dim_venues,
+  name foundation.dim_venues,
   kind FULL,
   cron '@daily',
   grain venue_id
@@ -22,7 +22,7 @@ WITH all_venues AS (
     postcode,
     NULL AS tenant_type,
     extracted_date
-  FROM padelnomics.stg_padel_courts
+  FROM staging.stg_padel_courts
   WHERE country_code IS NOT NULL
 
   UNION ALL
@@ -38,7 +38,7 @@ WITH all_venues AS (
     postcode,
     tenant_type,
     extracted_date
-  FROM padelnomics.stg_playtomic_venues
+  FROM staging.stg_playtomic_venues
   WHERE country_code IS NOT NULL
 ),
 -- Rank venues so Playtomic records win ties in proximity dedup