Uncomment and activate Uvicorn server configuration

- Restore main block for running FastAPI application
- Enable direct server startup with Uvicorn
- Set host to 0.0.0.0 and port to 7860
- Simplify application runtime initialization

app.py

@@ -109,6 +109,6 @@ async def generate(request: QueryRequest):
     except Exception as e:
         raise HTTPException(status_code=500, detail=f"Error al generar texto: {str(e)}")
 
-# if __name__ == "__main__":
-#     import uvicorn
-#     uvicorn.run(app, host="0.0.0.0", port=7860)
+if __name__ == "__main__":
+    import uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=7860)