feat(dns): add db-backed DNS provider, domain, and record management with ops UI support

ts/db/documents/classes.dns-provider.doc.ts

@@ -0,0 +1,63 @@
+import * as plugins from '../../plugins.js';
+import { DcRouterDb } from '../classes.dcrouter-db.js';
+import type {
+  TDnsProviderType,
+  TDnsProviderStatus,
+  TDnsProviderCredentials,
+} from '../../../ts_interfaces/data/dns-provider.js';
+
+const getDb = () => DcRouterDb.getInstance().getDb();
+
+@plugins.smartdata.Collection(() => getDb())
+export class DnsProviderDoc extends plugins.smartdata.SmartDataDbDoc<DnsProviderDoc, DnsProviderDoc> {
+  @plugins.smartdata.unI()
+  @plugins.smartdata.svDb()
+  public id!: string;
+
+  @plugins.smartdata.svDb()
+  public name: string = '';
+
+  @plugins.smartdata.svDb()
+  public type!: TDnsProviderType;
+
+  /**
+   * Provider credentials, persisted as an opaque object. Shape varies by `type`.
+   * Never returned to the UI — handlers map to IDnsProviderPublic before sending.
+   */
+  @plugins.smartdata.svDb()
+  public credentials!: TDnsProviderCredentials;
+
+  @plugins.smartdata.svDb()
+  public status: TDnsProviderStatus = 'untested';
+
+  @plugins.smartdata.svDb()
+  public lastTestedAt?: number;
+
+  @plugins.smartdata.svDb()
+  public lastError?: string;
+
+  @plugins.smartdata.svDb()
+  public createdAt!: number;
+
+  @plugins.smartdata.svDb()
+  public updatedAt!: number;
+
+  @plugins.smartdata.svDb()
+  public createdBy!: string;
+
+  constructor() {
+    super();
+  }
+
+  public static async findById(id: string): Promise<DnsProviderDoc | null> {
+    return await DnsProviderDoc.getInstance({ id });
+  }
+
+  public static async findAll(): Promise<DnsProviderDoc[]> {
+    return await DnsProviderDoc.getInstances({});
+  }
+
+  public static async findByType(type: TDnsProviderType): Promise<DnsProviderDoc[]> {
+    return await DnsProviderDoc.getInstances({ type });
+  }
+}