Fix property test CI failure: mock db module before importing route

backend/__tests__/fp-submissions-cleanup.property.test.js

@@ -10,6 +10,19 @@
  */
 
 const fc = require('fast-check');
+
+// Mock db pool before importing the route module (avoids DATABASE_URL requirement)
+jest.mock('../db', () => ({
+    query: jest.fn(() => Promise.resolve({ rows: [], rowCount: 0 })),
+}));
+
+// Mock dependencies that the route module imports
+jest.mock('../helpers/auditLog', () => jest.fn());
+jest.mock('../helpers/ivantiApi', () => ({
+    ivantiFormPost: jest.fn(),
+    ivantiPost: jest.fn(),
+}));
+
 const { filterVisibleSubmissions, shouldShowDismissButton } = require('../routes/ivantiFpWorkflow');
 
 // --- Generators ---