Security hardening: auth encapsulation, pool restriction, rate limiting, invites, async webhooks

Phase 1 (Security Critical):
- Auth plugin encapsulation: replaced global addHook with Fastify plugin scope
- Removed startsWith URL matching; public routes registered outside auth scope
- JWT verify now enforces algorithms: ['HS256'] (prevents algorithm confusion)
- Raw pool no longer exported from db.ts; systemQuery() + getPoolForAuth() instead
- withTenant() remains primary tenant-scoped query path

Phase 2 (Infrastructure):
- docker-compose.yml: all secrets via env var substitution (${VAR:-default})
- Per-service Postgres users (dd0c_drift, dd0c_alert, etc.) in docker-init-db.sh
- .env.example with all configurable secrets
- build-push.sh uses $REGISTRY_PASSWORD instead of hardcoded
- .gitignore excludes .env files
- @fastify/rate-limit: 100 req/min global, 5/min login, 3/min signup
- CORS_ORIGIN default changed from '*' to 'http://localhost:5173'

Phase 3 (Product):
- Team invite flow: tenant_invites table, POST /invite, GET /invites, DELETE /invites/:id
- Signup accepts optional invite_token to join existing tenant
- Async webhook ingestion (P3): LPUSH to Redis, BRPOP worker, dead-letter queue

Console:
- All 5 product modules wired: drift, alert, portal, cost, run
- PageHeader accepts children prop
- 71 modules, 70KB gzipped production build

All 6 projects compile clean (tsc --noEmit).

products/console/src/shell/App.tsx

@@ -4,9 +4,13 @@ import { useAuth } from './AuthProvider';
 import { LoginPage } from './LoginPage';
 import { Layout } from './Layout';
 import { driftManifest } from '../modules/drift/manifest.js';
+import { alertManifest } from '../modules/alert/manifest.js';
+import { portalManifest } from '../modules/portal/manifest.js';
+import { costManifest } from '../modules/cost/manifest.js';
+import { runManifest } from '../modules/run/manifest.js';
 import type { ModuleManifest } from '../modules/drift/manifest.js';
 
-const allModules: ModuleManifest[] = [driftManifest];
+const allModules: ModuleManifest[] = [driftManifest, alertManifest, portalManifest, costManifest, runManifest];
 
 function OverviewPage() {
   return (