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Apply migrations and backfill scripts for location data and approval flow, including:
- Implemented backfill_park_locations function to populate missing park locations from approved submissions
- Adjusted process_approval_transaction to properly handle location creation and linking
- Added admin-triggered backfill trigger point and related migration scaffolding for execution
- Created edge-function and admin UI hook to run backfill as needed
- Ensure search_path and relational data usage fixes for stability

src/integrations/supabase/types.ts

@@ -6632,6 +6632,7 @@ export type Database = {
         Args: { target_user_id: string }
         Returns: undefined
       }
+      backfill_park_locations: { Args: never; Returns: Json }
       backfill_sort_orders: { Args: never; Returns: undefined }
       block_aal1_with_mfa: { Args: never; Returns: boolean }
       can_approve_submission_item: {