feat(governance): automate harness consistency checks (phase 3)

scripts/setup_gitea_labels.py

@@ -171,16 +171,23 @@ class GiteaClient:
 
     def list_labels(self) -> dict[str, dict[str, Any]]:
         result: dict[str, dict[str, Any]] = {}
+        seen_pages: set[tuple[str, ...]] = set()
         page = 1
         while True:
             labels = self.request("GET", f"/labels?limit=50&page={page}")
             if not isinstance(labels, list):
                 raise RuntimeError("Gitea labels 响应格式异常。")
+            if not labels:
+                return result
+            if not all(isinstance(label, dict) for label in labels):
+                raise RuntimeError("Gitea labels 响应包含非对象条目。")
+            signature = tuple(str(label.get("id") or label.get("name")) for label in labels)
+            if signature in seen_pages or page > 1000:
+                raise RuntimeError("Gitea labels 分页重复，已停止以避免无限读取。")
+            seen_pages.add(signature)
             for label in labels:
                 if isinstance(label, dict) and isinstance(label.get("name"), str):
                     result[label["name"]] = label
-            if len(labels) < 50:
-                return result
             page += 1