[P/D]The issue of solving the force-free secondary release request, which causes the node to crash. (#5968)

### What this PR does / why we need it?
The force-free secondary release request causes the node to crash. When
requests are pulled too quickly, they should not be added to the
delay-free queue.

### Does this PR introduce _any_ user-facing change?
No

### How was this patch tested?
By ci

- vLLM version: v0.13.0
- vLLM main:
2c24bc6996

Signed-off-by: wangxiaoteng <wangxiaoteng@huawei.com>

vllm_ascend/distributed/kv_transfer/kv_p2p/mooncake_connector.py

@@ -152,7 +152,8 @@ class KVCacheTaskTracker:
     def add_delayed_request(self, request_id: str, delay_start_time: float):
         """Add a delayed free request."""
         with self.done_task_lock:
-            self.delayed_free_requests[request_id] = delay_start_time
+            if request_id in self.reqs_to_process:
+                self.delayed_free_requests[request_id] = delay_start_time
 
     def _retrieve_expired_requests(self):
         """Retrieve all expired delayed requests."""