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__/auth-manager.test.js

@@ -1,11 +1,11 @@
 // Must mock crypto-utils BEFORE auth-manager is required,
 // because auth-manager.js line 13: const JWT_SECRET = cryptoUtils.loadOrCreateKey()
 const mockFixedKey = Buffer.alloc(32, 'jwt-test-key-pad');
-jest.mock('../crypto-utils', () => ({
+jest.mock('../src/security/crypto-utils', () => ({
   loadOrCreateKey: jest.fn(() => mockFixedKey),
 }));
 
-jest.mock('../credential-manager', () => ({
+jest.mock('../src/managers/credential-manager', () => ({
   store: jest.fn().mockResolvedValue(true),
   retrieve: jest.fn().mockResolvedValue(null),
   delete: jest.fn().mockResolvedValue(true),
@@ -13,8 +13,8 @@ jest.mock('../credential-manager', () => ({
 }));
 
 const crypto = require('crypto');
-const authManager = require('../auth-manager');
-const credentialManager = require('../credential-manager');
+const authManager = require('../src/managers/auth-manager');
+const credentialManager = require('../src/managers/credential-manager');
 
 describe('AuthManager', () => {
   beforeEach(() => {