feat: CONAI Phase 1 MVP 초기 구현

소형 건설업체(100억 미만)를 위한 AI 기반 토목공사 통합관리 플랫폼

Backend (FastAPI):
- SQLAlchemy 모델 13개 (users, projects, wbs, tasks, daily_reports, reports, inspections, quality, weather, permits, rag, settings)
- API 라우터 11개 (auth, projects, tasks, daily_reports, reports, inspections, weather, rag, kakao, permits, settings)
- Services: Claude AI 래퍼, CPM Gantt 계산, 기상청 API, RAG(pgvector), 카카오 Skill API
- Alembic 마이그레이션 (pgvector 포함)
- pytest 테스트 (CPM, 날씨 경보)

Frontend (Next.js 15):
- 11개 페이지 (대시보드, 프로젝트, Gantt, 일보, 검측, 품질, 날씨, 인허가, RAG, 설정)
- TanStack Query + Zustand + Tailwind CSS

인프라:
- Docker Compose (PostgreSQL pgvector + backend + frontend)
- 한국어 README 및 설치 가이드

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/app/main.py

@@ -0,0 +1,53 @@
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+from contextlib import asynccontextmanager
+from app.config import settings
+from app.api import auth, projects, tasks, daily_reports, reports, inspections, weather, rag, kakao, permits, settings as settings_router
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    # Startup: seed default work types, check DB connection
+    yield
+    # Shutdown: cleanup resources
+
+
+def create_app() -> FastAPI:
+    app = FastAPI(
+        title="CONAI API",
+        description="소형 건설업체를 위한 AI 기반 토목공사 통합관리 플랫폼",
+        version=settings.APP_VERSION,
+        lifespan=lifespan,
+    )
+
+    # CORS
+    app.add_middleware(
+        CORSMiddleware,
+        allow_origins=settings.CORS_ORIGINS,
+        allow_credentials=True,
+        allow_methods=["*"],
+        allow_headers=["*"],
+    )
+
+    # API routers
+    api_prefix = "/api/v1"
+    app.include_router(auth.router, prefix=api_prefix)
+    app.include_router(projects.router, prefix=api_prefix)
+    app.include_router(tasks.router, prefix=api_prefix)
+    app.include_router(daily_reports.router, prefix=api_prefix)
+    app.include_router(reports.router, prefix=api_prefix)
+    app.include_router(inspections.router, prefix=api_prefix)
+    app.include_router(weather.router, prefix=api_prefix)
+    app.include_router(rag.router, prefix=api_prefix)
+    app.include_router(kakao.router, prefix=api_prefix)
+    app.include_router(permits.router, prefix=api_prefix)
+    app.include_router(settings_router.router, prefix=api_prefix)
+
+    @app.get("/health")
+    async def health():
+        return {"status": "ok", "version": settings.APP_VERSION}
+
+    return app
+
+
+app = create_app()