deprecated on event error

src/main.py

@@ -1,4 +1,5 @@
 import logging
+from contextlib import asynccontextmanager
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 from api.routes import router
@@ -12,11 +13,38 @@ logging.basicConfig(
 
 logger = logging.getLogger(__name__)
 
-# Create FastAPI app
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    """
+    Lifespan event handler for startup and shutdown
+    """
+    # Startup
+    logger.info("=" * 50)
+    logger.info(f"🚀 {settings.api_title} v{settings.api_version}")
+    logger.info("=" * 50)
+    
+    if settings.groq_api_key:
+        logger.info(f"✅ Groq API Key: Configured (length: {len(settings.groq_api_key)})")
+        logger.info(f"✅ Groq Model: {settings.groq_model}")
+    else:
+        logger.error("❌ GROQ_API_KEY is NOT set!")
+        logger.error("⚠️ API will NOT function without valid API key")
+    
+    logger.info("=" * 50)
+    
+    yield
+    
+    # Shutdown
+    logger.info("👋 Shutting down API...")
+
+
+# Create FastAPI app with lifespan
 app = FastAPI(
     title=settings.api_title,
     version=settings.api_version,
-    description=settings.api_description
+    description=settings.api_description,
+    lifespan=lifespan
 )
 
 # CORS configuration
@@ -31,21 +59,6 @@ app.add_middleware(
 # Include routes
 app.include_router(router, prefix="/api")
 
-@app.on_event("startup")
-async def startup_event():
-    """Log startup information"""
-    logger.info("=" * 50)
-    logger.info(f"🚀 {settings.api_title} v{settings.api_version}")
-    logger.info("=" * 50)
-    
-    if settings.groq_api_key:
-        logger.info(f"✅ Groq API Key: Configured (length: {len(settings.groq_api_key)})")
-        logger.info(f"✅ Groq Model: {settings.groq_model}")
-    else:
-        logger.error("❌ GROQ_API_KEY is NOT set!")
-        logger.error("⚠️ API will NOT function without valid API key")
-    
-    logger.info("=" * 50)
 
 @app.get("/")
 async def root():
@@ -62,6 +75,7 @@ async def root():
         }
     }
 
+
 @app.get("/api/v1/health")
 async def health_check():
     """Health check endpoint"""