[ci] feat: add mergify

.github/mergify.yml

@@ -0,0 +1,28 @@
+pull_request_rules:
+  - name: comment-pre-commit-failure
+    description: Comment on PR when pre-commit check fails
+    conditions:
+      - check-failure=pre-commit / pre-commit (3.12)
+      - -closed
+      - -draft
+    actions:
+      comment:
+        message: |
+          Hi @{{author}}, the pre-commit checks have failed. Please run:
+
+          ```bash 
+          pip install pre-commit
+          pre-commit install
+          # for staged changes
+          pre-commit run
+          # for all files in the repo
+          pre-commit run --all-files
+          ```
+
+          Then, commit the changes and push to your branch.
+
+          For future commits, `pre-commit` will run automatically on changed files before each commit.
+
+      label:
+        add:
+          - pre-commit-failed

tests/checkpoint_engine/test_special_server_adapter.py

@@ -86,6 +86,8 @@ async def test_server_adapter(init_config):
         resource_pool=rollout_pool, ray_cls_with_init=ray_cls_with_init, device_name=get_device_name()
     )
 
+
+
     # 2.2 create rollout replicas
     rollout_replica_class = get_rollout_replica_class(rollout_config.name)
     rollout_replicas = [