feat: add dcrouter external gateway sync

ts/database/repositories/certificate.repository.ts

@@ -43,7 +43,7 @@ export class CertificateRepository extends BaseRepository {
     return rows.map((row) => this.rowToDomain(row));
   }
 
-  getDomainsByProvider(provider: 'cloudflare' | 'manual'): IDomain[] {
+  getDomainsByProvider(provider: NonNullable<IDomain['dnsProvider']>): IDomain[] {
     const rows = this.query('SELECT * FROM domains WHERE dns_provider = ? ORDER BY domain ASC', [provider]);
     return rows.map((row) => this.rowToDomain(row));
   }