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/marketing/contact/utils/schema.ts

@@ -0,0 +1,11 @@
+import * as z from "zod";
+
+export const MAX_MESSAGE_LENGTH = 4000;
+
+export const contactFormSchema = z.object({
+  name: z.string().min(2),
+  email: z.email().max(254),
+  message: z.string().min(10).max(MAX_MESSAGE_LENGTH),
+});
+
+export type ContactFormPayload = z.infer<typeof contactFormSchema>;