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>

apps/web/instrumentation.ts

@@ -0,0 +1,9 @@
+import { initialize } from "@turbostarter/monitoring-web/server";
+import { validateRuntimeEnv } from "@turbostarter/shared/validate-env";
+
+export function register() {
+  validateRuntimeEnv();
+  initialize();
+}
+
+export { onRequestError } from "@turbostarter/monitoring-web/server";