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/src/context/caddy.js

@@ -2,7 +2,7 @@
  * Caddy context - Caddyfile manipulation and reload
  */
 const fsp = require('fs').promises;
-const { RETRIES } = require('../../constants');
+const { RETRIES } = require('../utilities/constants');
 
 /**
  * Atomically read-modify-write the Caddyfile and reload Caddy.

dashcaddy-api/src/context/dns.js

@@ -6,8 +6,8 @@
  * 
  * This module now delegates to the provider system internally.
  */
-const { TIMEOUTS, SESSION_TTL, CADDY } = require('../../constants');
-const { createCache, CACHE_CONFIGS } = require('../../cache-config');
+const { TIMEOUTS, SESSION_TTL, CADDY } = require('../utilities/constants');
+const { createCache, CACHE_CONFIGS } = require('../utilities/cache-config');
 const { createProviderDnsContext } = require('./provider-dns');
 
 // DNS token management

dashcaddy-api/src/context/docker.js

@@ -2,7 +2,7 @@
  * Docker context - Docker client and operations
  */
 const Docker = require('dockerode');
-const { DOCKER } = require('../../constants');
+const { DOCKER } = require('../utilities/constants');
 
 const docker = new Docker();
 

dashcaddy-api/src/context/index.js

@@ -6,7 +6,7 @@ const { createDockerContext } = require('./docker');
 const { createCaddyContext } = require('./caddy');
 const { createDnsContext } = require('./dns');
 const { createSessionContext } = require('./session');
-const NotificationManager = require('../../notification-manager');
+const NotificationManager = require('../managers/notification-manager');
 
 /**
  * Assemble the full application context

dashcaddy-api/src/context/provider-dns.js

@@ -6,8 +6,8 @@
  * Falls back to legacy Technitium context for backward compatibility
  * when no provider is explicitly configured.
  */
-const { createCache, CACHE_CONFIGS } = require('../../cache-config');
-const { TIMEOUTS, SESSION_TTL, CADDY } = require('../../constants');
+const { createCache, CACHE_CONFIGS } = require('../utilities/cache-config');
+const { TIMEOUTS, SESSION_TTL, CADDY } = require('../utilities/constants');
 const registry = require('../../dns-providers/registry');
 
 // Per-server token cache (legacy Technitium)