[DO NOT MERGE] Temporarily run on pull_request to exercise the workflow

workflow_dispatch is only available for workflows already on the default
branch, and a pull_request run from a fork receives no secrets, so the
ClickHouse step would fail. Running from a same-repo branch gives the run
access to CLICKHOUSE_HUD_USER_*.

REVERT THIS COMMIT BEFORE MERGING.

Author: atalman

.github/workflows/vllm-torch-nightly-triage.yml

@@ -12,6 +12,13 @@ name: vLLM torch-nightly triage
 # via .claude/skills/vllm-pytorch-ci-triage) without this job needing a Buildkite token.
 
 on:
+  # TEMPORARY (DO NOT MERGE): run on PRs touching this workflow so it can be
+  # exercised before landing. workflow_dispatch only works once the file is on
+  # the default branch, and a fork PR gets no secrets -- hence a same-repo branch.
+  pull_request:
+    paths:
+      - .github/workflows/vllm-torch-nightly-triage.yml
+      - tools/torchci/vllm_torch_nightly_triage.py
   workflow_dispatch:
     inputs:
       lookback_days: