chore(deps): bump commit-check to 2.17.0 for the warn status

The warn rendering merged in #276 needs commit-check to report
"status": "warn", which it does from 2.17.0. The pin stayed at 2.16.0,
which never emits it, so the feature was unreachable in every run.

Add a test that asserts both the installed package and the
requirements.txt pin are at least 2.17.0, so the pin cannot silently
lag a feature that depends on the engine again.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018xYa7m3qup5wyN5MaXFgf6

Author: shenxianpeng

main_test.py

@@ -1,8 +1,10 @@
 """Unit tests for main.py."""
 
+import importlib.metadata
 import io
 import json
 import os
+import re
 import sys
 import tempfile
 import unittest
@@ -592,6 +594,44 @@ def fake_other_checks(args):
         self.assertIn("--branch", captured_args)
 
 
+class TestCommitCheckVersionPin(unittest.TestCase):
+    """The warn rendering is inert against an engine that never emits it.
+
+    commit-check reports ``"status": "warn"`` from 2.17.0; the action pinned
+    2.16.0 for a release after shipping the rendering, so nobody could ever
+    see it. Both the installed package and the pin have to keep up.
+    """
+
+    MINIMUM = (2, 17, 0)
+
+    @staticmethod
+    def _parse(version: str) -> tuple[int, ...]:
+        match = re.match(r"(\d+)\.(\d+)\.(\d+)", version)
+        assert match, f"unparsable commit-check version: {version!r}"
+        return tuple(int(part) for part in match.groups())
+
+    def test_installed_commit_check_can_report_warnings(self):
+        try:
+            version = importlib.metadata.version("commit-check")
+        except importlib.metadata.PackageNotFoundError:
+            self.skipTest("commit-check is not installed")
+        self.assertGreaterEqual(
+            self._parse(version),
+            self.MINIMUM,
+            f"installed commit-check {version} predates the warn status",
+        )
+
+    def test_requirements_pin_can_report_warnings(self):
+        here = os.path.dirname(os.path.abspath(main.__file__))
+        with open(os.path.join(here, "requirements.txt"), encoding="utf-8") as f:
+            pins = dict(
+                line.strip().split("==", 1)
+                for line in f
+                if "==" in line and not line.startswith("#")
+            )
+        self.assertGreaterEqual(self._parse(pins["commit-check"]), self.MINIMUM)
+
+
 class TestRenderStepLog(unittest.TestCase):
     def _run(self, results):
         buffer = io.StringIO()

requirements.txt

@@ -1,5 +1,5 @@
 # Install commit-check CLI
 # For details please see: https://github.com/commit-check/commit-check
-commit-check==2.16.0
+commit-check==2.17.0
 # Interact with the GitHub API.
 PyGithub==2.10.0