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/billing/src/config/index.ts

@@ -0,0 +1,18 @@
+import { BillingStatus } from "../types";
+
+import { discounts, plans } from "./plans";
+import { billingConfigSchema } from "./schema";
+
+import type { BillingConfig } from "../types";
+
+export const config = billingConfigSchema.parse({
+  plans,
+  discounts,
+}) satisfies BillingConfig;
+
+export const ACTIVE_BILLING_STATUSES: BillingStatus[] = [
+  BillingStatus.ACTIVE,
+  BillingStatus.TRIALING,
+];
+
+export * from "./features";