Initial import: property management SaaS + security hardening + admin dashboard

Property Management Network — Next.js 16 (App Router), Better Auth,
Drizzle ORM over PostgreSQL, Stripe, OpenAI, Resend.

Includes:
- Security hardening: access-control/IDOR fixes, TLS-by-default DB layer,
  constant-time cron auth, strict security headers, atomic AI quota gating,
  HTML/email output encoding, demo-backdoor disabled in production.
- Superadmin dashboard at /admin (overview/MRR, server-paginated users with
  ban/impersonate/plan/delete, billing, platform activity + admin audit log,
  AI usage, system health) via the Better Auth admin plugin.
- Seed/migration utility scripts under scripts/.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/api/health/route.ts

@@ -0,0 +1,14 @@
+import { NextResponse } from "next/server"
+
+// Lightweight liveness probe used by the Docker HEALTHCHECK and Coolify.
+// Intentionally does NOT touch the database — a transient DB blip should not
+// cause the container to be marked unhealthy and restarted.
+export const dynamic = "force-dynamic"
+
+export function GET() {
+  return NextResponse.json({
+    status: "ok",
+    service: "property-management-network",
+    timestamp: new Date().toISOString(),
+  })
+}