Security hardening: deps, tenancy quotas, auth, deploy, webhooks

Addresses the findings from the platform security audit. Verified green:
all-workspace typecheck, web build, 16 API unit tests, 23 e2e auth tests,
and 0 high/critical production dependency vulnerabilities.

Dependencies (High):
- Bump drizzle-orm 0.36→0.45.2 (GHSA-gpj5-g38j-94v9 SQLi-via-identifier)
  and drizzle-kit→0.31.10; npm audit fix cleared fast-uri path-traversal
  and the react-router open-redirect. Remaining audit items are dev-only
  build tooling (esbuild/vite), not shipped at runtime.

AI cost control + storage quota (new ai_usage table, migration 0002):
- Per-firm monthly AI token budget enforced before each completion (429),
  with every completion recorded to an ai_usage ledger (lib/ai-usage.ts).
- Enforce per-plan storage quota on upload (402) and maintain
  storage_bytes_used on upload/delete (lib/storage-quota.ts); widen the
  column int→bigint so 8GB/50GB plans don't overflow.

Auth (defense-in-depth):
- Constant-time login: verify against a dummy argon2 hash when the account
  doesn't exist, closing the timing/enumeration oracle (verifyPasswordSafe).
- Enforce suspension on requireSuperadmin, /auth/me, /auth/resend-verification.

Web:
- Validate the post-login ?next= redirect to same-origin paths only
  (open-redirect / phishing).

Deploy hardening:
- docker-compose: memory/CPU limits so a spike can't OOM the Dokploy host.
- .dockerignore: keep destructive one-off scripts (seed-demo, create-admin,
  migrate-storage) out of the runtime image; retain the cron scripts.
- seed-demo.ts: hard-refuse NODE_ENV=production and the prod DB host.

Webhooks / config:
- Stripe idempotency via a stripe_events ledger (skip already-processed
  events; record only after successful processing so a transient failure
  still retries); make the plan-upgraded email non-blocking.
- Rate-limit account export and invoice PDF; cap invoice item arrays at 200.
- Require TURNSTILE_SECRET_KEY in production (bot protection no longer fails
  open on a forgotten key); don't load .env under NODE_ENV=test so the suite
  is hermetic.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

apps/api/src/routes/invoices.ts

@@ -31,8 +31,8 @@ const createBody = z.object({
   taxRate: z.coerce.number().min(0).max(100).default(0),
   dueAt: z.string().datetime().nullable().optional(),
   // Either provide explicit items or supply timeEntryIds to generate items from time entries.
-  items: z.array(itemBody).optional(),
-  timeEntryIds: z.array(z.string().uuid()).optional(),
+  items: z.array(itemBody).max(200).optional(),
+  timeEntryIds: z.array(z.string().uuid()).max(200).optional(),
 });
 
 const updateBody = z.object({
@@ -548,7 +548,10 @@ export async function invoicesRoutes(app: FastifyInstance) {
   });
 
   // PDF download
-  app.get('/api/invoices/:id/pdf', async (req, reply) => {
+  app.get(
+    '/api/invoices/:id/pdf',
+    { config: { rateLimit: { max: 60, timeWindow: '1 hour' } } },
+    async (req, reply) => {
     const firmId = req.user!.firmId!;
     const { id } = z.object({ id: z.string().uuid() }).parse(req.params);
     const db = getDb();