fix timer

main.py

@@ -89,10 +89,10 @@ def generate(request: GenerationRequest):
 async def handle_logging_and_errors(request: Request, call_next):
     t = time.perf_counter()
     response = await call_next(request)
-    process_time = time.time() - t
+    process_time = time.perf_counter() - t
     response.headers["X-Process-Time"] = str(process_time)
     logger.info(f"Request took {t:.3f} seconds")
-    
+
     f = open("/tmp/health_readiness", "w")
     f.close()