feat(db): mesh data model — meshes, members, invites, audit log

- pgSchema "mesh" with 4 tables isolating the peer mesh domain
- Enums: visibility, transport, tier, role
- audit_log is metadata-only (E2E encryption enforced at broker/client)
- Cascade on mesh delete, soft-delete via archivedAt/revokedAt

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/i18n/src/typings/i18n.d.ts

@@ -0,0 +1,21 @@
+import "i18next";
+
+import type { config } from "../config";
+import type { translations } from "../translations";
+
+type ExtractDefault<T> = T extends () => Promise<infer R>
+  ? R extends { default: infer D }
+    ? D
+    : never
+  : never;
+
+type Translation = (typeof translations)[keyof typeof translations];
+
+declare module "i18next" {
+  interface CustomTypeOptions {
+    defaultNS: typeof config.namespaces;
+    resources: {
+      [K in keyof Translation]: ExtractDefault<Translation[K]>;
+    };
+  }
+}