feat(acme): add DB-backed ACME configuration management and OpsServer certificate settings UI

ts_interfaces/data/acme-config.ts

@@ -0,0 +1,25 @@
+/**
+ * ACME configuration for automated TLS certificate issuance via Let's Encrypt.
+ *
+ * Persisted as a singleton `AcmeConfigDoc` in the DcRouterDb. Replaces the
+ * legacy constructor fields `tls.contactEmail` / `smartProxyConfig.acme.*`
+ * which are now seed-only (used once on first boot if the DB is empty).
+ *
+ * Managed via the OpsServer UI at **Domains > Certificates > Settings**.
+ */
+export interface IAcmeConfig {
+  /** Contact email used for Let's Encrypt account registration. */
+  accountEmail: string;
+  /** Whether ACME is enabled. If false, no certs are issued via ACME. */
+  enabled: boolean;
+  /** True = Let's Encrypt production, false = staging. */
+  useProduction: boolean;
+  /** Whether to automatically renew certs before expiry. */
+  autoRenew: boolean;
+  /** Renew when a cert has fewer than this many days of validity left. */
+  renewThresholdDays: number;
+  /** Unix ms timestamp of last config change. */
+  updatedAt: number;
+  /** Who last updated the config (userId or 'seed' / 'system'). */
+  updatedBy: string;
+}