implement JellyStat API for watch history, genre summary, and user summary; add PostgreSQL connection pool and update requirements

main.py

@@ -6,6 +6,7 @@ from fastapi.middleware.cors import CORSMiddleware
 
 from gateway.v1.auth import router as auth_router
 from gateway.v1.chat import router as v1_router
+from gateway.jellystat.api import router as jellystat_router
 from src.config import DEEPSEEK_API_KEY, get_config
 from src.llm import create_client
 
@@ -33,11 +34,15 @@ import gateway.auth.jellyfin  # noqa: E402 — self-registers JellyfinAuth
 @asynccontextmanager
 async def lifespan(app: FastAPI):
     from gateway.discord.bot import start_in_background  # noqa: E402
+    from gateway.jellystat.db import init_pool, close_pool  # noqa: E402
 
+    await init_pool(app)
     start_in_background()
 
     yield
 
+    await close_pool(app)
+
 
 # ---------------------------------------------------------------------------
 # App
@@ -64,4 +69,5 @@ app.state.agent_graphs: dict = {}
 # Routers
 # ---------------------------------------------------------------------------
 app.include_router(v1_router, prefix="/v1")
-app.include_router(auth_router)
+app.include_router(auth_router)
+app.include_router(jellystat_router)