Expose any errors from verifying commits

Author: shangyian

datajunction-server/datajunction_server/internal/git/github_service.py

@@ -615,7 +615,10 @@ async def verify_commit(self, repo_path: str, commit_sha: str) -> bool:
                 headers=self.headers,
                 timeout=30.0,
             )
-            return resp.status_code == 200
+            if resp.status_code == 404:
+                return False
+            self._handle_error(resp, f"verify commit {commit_sha} in {repo_path}")
+            return True
 
     async def download_archive(
         self,