Fix health check endpoint due to httpx session

api/main.py

@@ -141,14 +141,14 @@ async def get_home(request: Request):
 @wrappers.exclude_rate_limit
 async def health():
     start_time = asyncio.get_event_loop().time()
-    async with httpx.AsyncClient(proxy=settings.requests_proxy_url) as session:
+    async with httpx.AsyncClient(proxy=settings.requests_proxy_url) as client:
         try:
-            async with session.head("https://www.google.com", timeout=10) as response:
-                return {
-                    "status": "healthy",
-                    "status_code": response.status,
-                    "time": asyncio.get_event_loop().time() - start_time,
-                }
+            response = await client.head("https://www.google.com", timeout=10)
+            return {
+                "status": "healthy",
+                "status_code": response.status_code,
+                "time": asyncio.get_event_loop().time() - start_time,
+            }
         except Exception as e:
             logging.error("Health check failed: %s", e)
             raise HTTPException(status_code=503, detail="Health check failed.")