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

ts_interfaces/data/dns-provider.ts

@@ -0,0 +1,73 @@
+/**
+ * Supported DNS provider types. Initially Cloudflare; the abstraction is
+ * designed so additional providers (Route53, Gandi, DigitalOcean…) can be
+ * added by implementing the IDnsProvider class interface in ts/dns/providers/.
+ */
+export type TDnsProviderType = 'cloudflare';
+
+/**
+ * Status of the last connection test against a provider.
+ */
+export type TDnsProviderStatus = 'untested' | 'ok' | 'error';
+
+/**
+ * Cloudflare-specific credential shape.
+ */
+export interface ICloudflareCredentials {
+  apiToken: string;
+}
+
+/**
+ * Discriminated union of all supported provider credential shapes.
+ * Persisted opaquely on `IDnsProvider.credentials`.
+ */
+export type TDnsProviderCredentials =
+  | ({ type: 'cloudflare' } & ICloudflareCredentials);
+
+/**
+ * A registered DNS provider account. Holds the credentials needed to
+ * call the provider's API and a snapshot of its last health check.
+ */
+export interface IDnsProvider {
+  id: string;
+  name: string;
+  type: TDnsProviderType;
+  /** Opaque credentials object — shape depends on `type`. */
+  credentials: TDnsProviderCredentials;
+  status: TDnsProviderStatus;
+  lastTestedAt?: number;
+  lastError?: string;
+  createdAt: number;
+  updatedAt: number;
+  createdBy: string;
+}
+
+/**
+ * A redacted view of IDnsProvider safe to send to the UI / over the wire.
+ * Strips secret fields from `credentials` while preserving the rest.
+ */
+export interface IDnsProviderPublic {
+  id: string;
+  name: string;
+  type: TDnsProviderType;
+  status: TDnsProviderStatus;
+  lastTestedAt?: number;
+  lastError?: string;
+  createdAt: number;
+  updatedAt: number;
+  createdBy: string;
+  /** Whether credentials are configured (true after creation). Never the secret itself. */
+  hasCredentials: boolean;
+}
+
+/**
+ * A domain reported by a provider's API (not yet imported into dcrouter).
+ */
+export interface IProviderDomainListing {
+  /** FQDN of the zone (e.g. 'example.com'). */
+  name: string;
+  /** Provider's internal zone identifier (zone_id for Cloudflare). */
+  externalId: string;
+  /** Authoritative nameservers reported by the provider. */
+  nameservers: string[];
+}