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>

drizzle.config.ts

@@ -0,0 +1,16 @@
+import { defineConfig } from "drizzle-kit"
+import { config } from "dotenv"
+
+// drizzle-kit runs outside Next.js, so load .env.local explicitly.
+config({ path: ".env.local" })
+
+export default defineConfig({
+  schema: "./lib/db/schema.ts",
+  out: "./lib/db/migrations",
+  dialect: "postgresql",
+  dbCredentials: {
+    url: process.env.DATABASE_URL!,
+  },
+  verbose: true,
+  strict: true,
+})