Add tests for authentication and security features

- Implement unit tests for password handling in `auth_test.ts`, covering bcrypt and legacy password hashes.
- Create a fake database for user management to facilitate testing of the `AdminHandler`.
- Validate JWT-based identity verification against database records.
- Introduce tests for credential encryption and registry management in `security_test.ts`.
- Ensure registry passwords are securely stored and can be decrypted correctly, including legacy support.
- Add utility functions for password hashing and verification in `auth.ts`.

ts/classes/dns.ts

@@ -27,7 +27,8 @@ export class OneboxDnsManager {
   async init(): Promise<void> {
     try {
       // Get Cloudflare credentials from settings
-      const apiKey = this.database.getSetting('cloudflareAPIKey');
+      const apiKey = this.database.getSetting('cloudflareAPIKey')
+        || this.database.getSetting('cloudflareToken');
       const serverIP = this.database.getSetting('serverIP');
 
       if (!apiKey) {