fix(roads): split parameterized queries into individual statements to satisfy node-postgres prepared statement rule

apps/api/src/maps/road-refinement.controller.ts

@@ -228,14 +228,14 @@ export class RoadRefinementController {
       `);
 
       // 2. Direct insert into approved_roads immediately (Delete existing first to ensure idempotency)
+      await this.dataSource.query(`DELETE FROM approved_roads WHERE candidate_id = $1::uuid`, [id]);
       await this.dataSource.query(`
-        DELETE FROM approved_roads WHERE candidate_id = $1::uuid;
         INSERT INTO approved_roads (
           candidate_id, geometry, name, highway, confidence, "uniqueDriverCount", oneway, approved_at
         )
         SELECT 
           id, geometry::geometry, COALESCE(name, 'Unnamed Road'), COALESCE(highway, 'residential'), confidence, "uniqueDriverCount", COALESCE(oneway, 0), NOW()
-        FROM candidate_roads WHERE id = $1::uuid;
+        FROM candidate_roads WHERE id = $1::uuid
       `, [id]);
 
       // 3. Mark candidate as approved