Fix: RateLimit requests were not released when a streaming generation exception occurred (#11540)

api/core/app/features/rate_limiting/rate_limit.py

             raise StopIteration
         try:
             return next(self.generator)
-        except StopIteration:
+        except Exception:
             self.close()
             raise
 

api/services/app_generate_service.py

                 raise ValueError(f"Invalid app mode {app_model.mode}")
         except RateLimitError as e:
             raise InvokeRateLimitError(str(e))
+        except Exception:
+            rate_limit.exit(request_id)
+            raise
         finally:
             if not streaming:
                 rate_limit.exit(request_id)