DC-005: Fix all 138 broken test paths after src/ refactor

After the DC-005 module reorganization (41 files moved into src/ subdirs),
138 test suites failed because the refactor script's path-rewrite logic
missed three categories:

1. Files inside src/ doing 'require("./src/...")' — should be 'require("../...")'
2. Files in src/X/Y/ doing 'require("../../../src/...")' — should be 'require("../../...")'
3. Test files in __tests__/ with leftover 'require("../../../src/...")' paths

Root cause: the original refactor script ran before all files were moved,
so it computed relative paths against stale filesystem state.

Result:
- 30/30 test suites pass
- 879/879 tests pass (was: 18/30 suites, 614/687 tests)

Also fixed:
- routes/apps/restore.js: wrong responses import path
- routes/*/*.js: '../../src/utilities/X' → '../src/utilities/X' (depth 2 routes)

dashcaddy-api/__tests__/csrf-protection.test.js

@@ -2,7 +2,7 @@ const crypto = require('crypto');
 
 // Mock crypto-utils to provide a predictable signing key
 const mockFixedKey = Buffer.alloc(32, 'test-key-material');
-jest.mock('../crypto-utils', () => ({
+jest.mock('../src/security/crypto-utils', () => ({
   loadOrCreateKey: jest.fn(() => mockFixedKey),
 }));
 
@@ -16,7 +16,7 @@ const {
   csrfCookieMiddleware,
   csrfValidationMiddleware,
   renewCSRFToken
-} = require('../csrf-protection');
+} = require('../src/security/csrf-protection');
 const { createMockReqRes } = require('./helpers/test-utils');
 
 describe('CSRF Protection', () => {