feat: Sprint 0 — CI/CD pipeline, production Docker, health checks

CI Pipeline (.github/workflows/ci.yml):
- 5 jobs: typecheck, lint, test, build, e2e (parallel where possible)
- PostgreSQL 16 + Redis 7 service containers for test/e2e
- pnpm store, Turborepo, Playwright browser caching
- Concurrency groups cancel in-progress runs

Production Docker:
- Dockerfile.prod: 3-stage build (deps → build → runtime ~150MB)
- docker-compose.prod.yml: postgres + redis + app with health checks
- .dockerignore for fast builds
- next.config.ts: output: "standalone" for minimal runtime

Health Check Endpoints:
- GET /api/health — liveness probe (200 OK, no deps)
- GET /api/ready — readiness probe (postgres + redis connectivity)

Documentation:
- docs/ci-cd-manual.md — full pipeline manual with troubleshooting
- plan.md — Product Owner strategic plan (bottlenecks, growth, automation)

Co-Authored-By: claude-flow <ruv@ruv.net>

apps/web/src/app/api/health/route.ts

@@ -0,0 +1,11 @@
+import { NextResponse } from "next/server";
+
+export const dynamic = "force-dynamic";
+export const runtime = "nodejs";
+
+export function GET() {
+  return NextResponse.json({
+    status: "ok",
+    timestamp: new Date().toISOString(),
+  });
+}