Fix lint errors

src/capa_de_integracion/main.py

@@ -1,6 +1,10 @@
+"""Main application entry point and FastAPI app configuration."""
+
 import logging
+from collections.abc import AsyncIterator
 from contextlib import asynccontextmanager
 
+import uvicorn
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 
@@ -17,7 +21,7 @@ logger = logging.getLogger(__name__)
 
 
 @asynccontextmanager
-async def lifespan(_: FastAPI):
+async def lifespan(_: FastAPI) -> AsyncIterator[None]:
     """Application lifespan manager."""
     # Startup
     logger.info("Initializing services...")
@@ -35,7 +39,9 @@ async def lifespan(_: FastAPI):
 
 app = FastAPI(
     title="Capa de Integración - Orchestrator Service",
-    description="Conversational AI orchestrator for Dialogflow CX, Gemini, and Vertex AI",
+    description=(
+        "Conversational AI orchestrator for Dialogflow CX, Gemini, and Vertex AI"
+    ),
     version="0.1.0",
     lifespan=lifespan,
 )
@@ -58,18 +64,16 @@ app.include_router(quick_replies_router)
 
 
 @app.get("/health")
-async def health_check():
+async def health_check() -> dict[str, str]:
     """Health check endpoint."""
     return {"status": "healthy", "service": "capa-de-integracion"}
 
 
 def main() -> None:
     """Entry point for CLI."""
-    import uvicorn
-
     uvicorn.run(
         "capa_de_integracion.main:app",
-        host="0.0.0.0",
+        host="0.0.0.0",  # noqa: S104
         port=8080,
         reload=True,
     )