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>

.context/turbostarter-framework-context/sections/mobile/push-notifications.md

@@ -0,0 +1,13 @@
+---
+title: Push notifications
+description: Engage your users with personalized notifications.
+url: /docs/mobile/push-notifications
+---
+
+# Push notifications
+
+<Callout title="Push notifications are coming soon" type="info">
+  We are working on push notifications to help you engage your users. Stay tuned for updates.
+
+  [See roadmap](https://github.com/orgs/turbostarter/projects/1)
+</Callout>