[NIXL] Improve request_finished() debug logs (#25665)

Signed-off-by: Mark McLoughlin <markmc@redhat.com>

Author: markmc

vllm/distributed/kv_transfer/kv_connector/v1/nixl_connector.py

@@ -463,7 +463,9 @@ def request_finished(
 
  params = request.kv_transfer_params
  logger.debug(
- "NIXLConnector request_finished, request_status=%s, kv_transfer_params=%s",
+ "NIXLConnector request_finished(%s), request_status=%s, "
+ "kv_transfer_params=%s",
+ request.request_id,
  request.status,
  params,
  )
@@ -495,6 +497,12 @@ def request_finished(
 
  if delay_free_blocks:
  # Prefill request on remote. It will be read from D upon completion
+ logger.debug(
+ "NIXLConnector request_finished(%s) waiting for %d seconds "
+ "for remote decode to fetch blocks",
+ request.request_id,
+ envs.VLLM_NIXL_ABORT_REQUEST_TIMEOUT,
+ )
  self._reqs_need_send[request.request_id] = (
  time.perf_counter() + envs.VLLM_NIXL_ABORT_REQUEST_TIMEOUT
  )