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/src/modules/billing/hooks/use-customer.ts

@@ -0,0 +1,5 @@
+import { useQuery } from "@tanstack/react-query";
+
+import { billing } from "~/modules/billing/lib/api";
+
+export const useCustomer = () => useQuery(billing.queries.customer.get);