chore(deps): upgrade python dependency stack

requirements.txt

@@ -1,4 +1,5 @@
 GitPython>=3.1.46
-google-genai>=1.72.0
+google-genai>=1.73.0
 openai>=2.31.0
+pydantic>=2.13.0
 python-dotenv>=1.2.2

tests/test_dependency_stack.py

@@ -0,0 +1,30 @@
+import subprocess
+import sys
+import unittest
+from importlib.metadata import version
+
+
+def parse_version(raw: str) -> tuple[int, ...]:
+    return tuple(int(part) for part in raw.split("."))
+
+
+class DependencyStackTest(unittest.TestCase):
+    def test_cli_help_smoke_test(self) -> None:
+        result = subprocess.run(
+            [sys.executable, "auto-commit.py", "--help"],
+            capture_output=True,
+            text=True,
+            check=False,
+        )
+
+        self.assertEqual(result.returncode, 0, result.stderr)
+        self.assertIn("Auto-Commit", result.stdout)
+
+    def test_dependency_versions_are_refreshed(self) -> None:
+        self.assertGreaterEqual(parse_version(version("google-genai")), (1, 73, 0))
+        self.assertGreaterEqual(parse_version(version("pydantic")), (2, 13, 0))
+        self.assertGreaterEqual(parse_version(version("pydantic_core")), (2, 46, 0))
+
+
+if __name__ == "__main__":
+    unittest.main()