修改普通用户的数据类型转换在数据集管理看不见的问题

backend/app/db/platform_store.py

@@ -534,7 +534,7 @@ class PlatformStore:
                 },
             )
             for table in ("models", "datasets", "eval_tasks"):
-                self._ensure_columns(conn, table, {"deleted_at": "TEXT", "deleted_by": "TEXT", "tenant_id": "TEXT", "project_id": "TEXT"})
+                self._ensure_columns(conn, table, {"deleted_at": "TEXT", "deleted_by": "TEXT", "tenant_id": "TEXT", "project_id": "TEXT", "created_by": "TEXT"})
             self._ensure_columns(
                 conn,
                 "resource_replicas",
@@ -557,6 +557,25 @@ class PlatformStore:
                     conn.executescript(extra_path.read_text(encoding="utf-8"))
             # data_convert_tasks 表补充 created_by 字段（用于数据隔离）
             self._ensure_columns(conn, "data_convert_tasks", {"created_by": "TEXT"})
+            # 修复历史数据：将 data_convert_tasks.created_by 回填到关联的 datasets 记录
+            try:
+                conn.execute("""
+                    UPDATE datasets SET created_by = dct.created_by
+                    FROM data_convert_tasks dct
+                    WHERE datasets.task_id = dct.id
+                      AND datasets.source = 'upload'
+                      AND (datasets.created_by IS NULL OR datasets.created_by = '')
+                      AND dct.created_by IS NOT NULL
+                      AND dct.deleted_at IS NULL
+                """)
+            except Exception:
+                pass  # 列不存在时忽略
+            # 清理超过 7 天的操作日志
+            try:
+                cutoff = (datetime.now(timezone.utc) - timedelta(days=7)).isoformat()
+                conn.execute("DELETE FROM operation_logs WHERE create_time < %s", (cutoff,))
+            except Exception:
+                pass  # 表不存在时忽略，下次启动会建表
 
     def _column_names(self, conn: PgConnection, table_name: str) -> set[str]:
         columns = conn.execute(