Initial commit: import from sinmb79/Gov-chat-bot

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

backend/app/main.py

@@ -0,0 +1,70 @@
+from contextlib import asynccontextmanager
+
+from fastapi import FastAPI
+
+from app.core.config import settings
+from app.core.database import startup_hook
+from app.core.middleware import TenantMiddleware
+from app.providers import get_embedding_provider, get_llm_provider, get_vectordb_provider
+from app.routers import health
+from app.routers import engine, skill
+from app.routers import admin_docs, admin_crawler
+from app.routers import admin_faq, admin_moderation, admin_complaints
+from app.routers import admin_auth, admin_metrics
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    await startup_hook()
+
+    # 전역 설정 로드
+    cfg = settings.model_dump()
+
+    # Provider 초기화
+    embedding = get_embedding_provider(cfg)
+    llm = get_llm_provider(cfg)
+    vectordb = get_vectordb_provider(cfg)
+
+    # 임베딩 워밍업 (시작 시 모델 로드)
+    try:
+        await embedding.warmup()
+    except Exception:
+        pass  # 실패해도 서버는 기동 — /ready에서 상태 노출
+
+    app.state.providers = {
+        "embedding": embedding,
+        "llm": llm,
+        "vectordb": vectordb,
+    }
+    app.state.tenant_configs = {}  # 캐시: {tenant_slug: config_dict}
+    app.state.redis = None  # Phase 1: Redis 연결은 선택적
+
+    # Redis 연결 시도
+    try:
+        import redis.asyncio as aioredis
+        r = aioredis.from_url(settings.REDIS_URL, socket_connect_timeout=2)
+        await r.ping()
+        app.state.redis = r
+    except Exception:
+        pass  # Redis 없이도 동작 (Idempotency 비활성)
+
+    yield
+
+    # 종료 시 Redis 연결 해제
+    if app.state.redis:
+        await app.state.redis.aclose()
+
+
+app = FastAPI(title="SmartBot KR", version="1.0.0", lifespan=lifespan)
+
+app.add_middleware(TenantMiddleware)
+app.include_router(health.router)
+app.include_router(engine.router)
+app.include_router(skill.router)
+app.include_router(admin_docs.router)
+app.include_router(admin_crawler.router)
+app.include_router(admin_auth.router)
+app.include_router(admin_faq.router)
+app.include_router(admin_moderation.router)
+app.include_router(admin_complaints.router)
+app.include_router(admin_metrics.router)