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>

docker-compose.prod.yml

@@ -0,0 +1,62 @@
+services:
+  postgres:
+    image: postgres:16-alpine
+    restart: unless-stopped
+    ports:
+      - "5432:5432"
+    environment:
+      POSTGRES_DB: planarchy
+      POSTGRES_USER: planarchy
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-changeme}
+    volumes:
+      - planarchy_prod_pgdata:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U planarchy"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+      start_period: 10s
+    shm_size: "256mb"
+
+  redis:
+    image: redis:7-alpine
+    restart: unless-stopped
+    ports:
+      - "6379:6379"
+    command: redis-server --maxmemory 256mb --maxmemory-policy allkeys-lru
+    volumes:
+      - planarchy_prod_redis:/data
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+      start_period: 5s
+
+  app:
+    build:
+      context: .
+      dockerfile: Dockerfile.prod
+    restart: unless-stopped
+    ports:
+      - "3000:3000"
+    env_file:
+      - .env.production
+    environment:
+      DATABASE_URL: postgresql://planarchy:${POSTGRES_PASSWORD:-changeme}@postgres:5432/planarchy
+      REDIS_URL: redis://redis:6379
+    depends_on:
+      postgres:
+        condition: service_healthy
+      redis:
+        condition: service_healthy
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:3000/api/health"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 20s
+
+volumes:
+  planarchy_prod_pgdata:
+  planarchy_prod_redis: