feat(agent_assets): 添加规则版本送审时的命名副本创建逻辑

当提交的版本与当前工作版本不同时，自动创建命名副本：
- 新增 _create_named_working_copy_for_review 方法处理送审时的版本复制
- 支持将工作版本快照复制为指定版本进行送审
- 新增 AgentAssetSpreadsheetChangeRecordRead schema
- API 端点新增 /rules/{id}/spreadsheet-versions/{version}/change-records 接口

server/src/app/api/v1/endpoints/agent_assets.py

@@ -23,6 +23,7 @@ from app.schemas.agent_asset import (
     AgentAssetRead,
     AgentAssetReviewCreate,
     AgentAssetReviewRead,
+    AgentAssetSpreadsheetChangeRecordRead,
     AgentAssetVersionCompareRead,
     AgentAssetUpdate,
     AgentAssetVersionCreate,
@@ -276,12 +277,17 @@ def handle_agent_asset_spreadsheet_onlyoffice_callback(
         str,
         Query(min_length=1, description="打开编辑器时对应的规则版本号。"),
     ],
+    actor_name: Annotated[
+        str | None,
+        Query(description="发起编辑的用户显示名。"),
+    ] = None,
 ) -> AgentAssetOnlyOfficeCallbackRead:
     try:
         AgentAssetService(db).handle_rule_spreadsheet_onlyoffice_callback(
             asset_id,
             version=version,
             payload=payload.model_dump(),
+            actor_name=actor_name,
         )
     except Exception as exc:
         _handle_asset_error(exc)
@@ -289,6 +295,24 @@ def handle_agent_asset_spreadsheet_onlyoffice_callback(
     return AgentAssetOnlyOfficeCallbackRead()
 
 
+@router.get(
+    "/{asset_id}/spreadsheet/change-records",
+    response_model=list[AgentAssetSpreadsheetChangeRecordRead],
+    summary="读取规则表最近修改记录",
+    description="返回最近 30 次 ONLYOFFICE 保存级修改记录，用于展示操作者、时间和具体差异。",
+)
+def list_agent_asset_spreadsheet_change_records(
+    asset_id: str,
+    _: CurrentUser,
+    db: DbSession,
+    limit: Annotated[int, Query(ge=1, le=30, description="返回条数，最多 30 条。")] = 30,
+) -> list[AgentAssetSpreadsheetChangeRecordRead]:
+    try:
+        return AgentAssetService(db).list_spreadsheet_change_records(asset_id, limit=limit)
+    except Exception as exc:
+        _handle_asset_error(exc)
+
+
 @router.post(
     "",
     response_model=AgentAssetRead,