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>

infra/supervisor/supervisor.sh

@@ -50,5 +50,8 @@ do
                 "$ALERT_WEBHOOK_URL" 2>/dev/null || true
         fi
         sleep 600  # back off 10 min on failure
+        continue
     }
+
+    sleep 86400  # run once per day
 done