Normalize data agent records output path

src/data_agent_records.py

@@ -549,6 +549,9 @@ def _dedupe_output_path(root: str, output_path: str, plan_id: str) -> str:
     from pathlib import Path
 
     path = Path(output_path)
+    # 会话 output 下的标准 records 文件名需要保持稳定；导出工具默认允许覆盖。
+    if path.name in {'records.jsonl', 'records.json'} and 'output' in path.parts:
+        return output_path
     resolved = path if path.is_absolute() else Path(root).resolve() / path
     if not resolved.exists():
         return output_path