feat: 平台治理与对象存储增强，审批中心与运行日志整合

- 新增 storage/policy.py 落盘策略：按大小/类型决定文件存 MinIO 或内联数据库
- 数据处理源文件与生成结果写入 MinIO 并登记 storage_objects，支持失败回滚
- 算力节点训练产物按版本归档到 MinIO，登记 model_artifacts
- 数据转换任务输入输出对象化，支持从 MinIO 读写
- 新增审批中心（申请/我的/策略）、组织与权限、运行日志整合页面
- schema 与 docker 配置、前端路由侧边栏、治理文档同步更新

Co-Authored-By: Claude <noreply@anthropic.com>

backend/app/modules/system/router.py

@@ -56,13 +56,15 @@ def audit_logs(
     actor_id: str | None = Query(default=None, description="操作人 ID"),
     action: str | None = Query(default=None, description="动作类型"),
     target_type: str | None = Query(default=None, description="目标类型"),
+    target_id: str | None = Query(default=None, description="目标 ID"),
+    keyword: str | None = Query(default=None, description="目标 ID 或详情关键字"),
     start_time: str | None = Query(default=None, description="ISO8601 起始时间"),
     end_time: str | None = Query(default=None, description="ISO8601 结束时间"),
     limit: int = Query(default=50, ge=1, le=200),
     offset: int = Query(default=0, ge=0),
     current_user: dict = Depends(get_current_user),
 ) -> dict:
-    """审计日志查询：按租户/项目/操作人/动作/目标类型/时间范围分页过滤。"""
+    """审计日志查询：按组织、操作人、动作、资源、关键字和时间范围分页过滤。"""
     if not is_admin(current_user):
         from app.api.v1.endpoints.platform import fail
         raise fail(403, "admin permission required")
@@ -73,6 +75,8 @@ def audit_logs(
         actor_id=actor_id,
         action=action,
         target_type=target_type,
+        target_id=target_id,
+        keyword=keyword,
         start_time=start_time,
         end_time=end_time,
         limit=limit,
@@ -88,6 +92,8 @@ def audit_logs_export(
     actor_id: str | None = Query(default=None, description="操作人 ID"),
     action: str | None = Query(default=None, description="动作类型"),
     target_type: str | None = Query(default=None, description="目标类型"),
+    target_id: str | None = Query(default=None, description="目标 ID"),
+    keyword: str | None = Query(default=None, description="目标 ID 或详情关键字"),
     start_time: str | None = Query(default=None, description="ISO8601 起始时间"),
     end_time: str | None = Query(default=None, description="ISO8601 结束时间"),
     current_user: dict = Depends(get_current_user),
@@ -103,6 +109,8 @@ def audit_logs_export(
         actor_id=actor_id,
         action=action,
         target_type=target_type,
+        target_id=target_id,
+        keyword=keyword,
         start_time=start_time,
         end_time=end_time,
         limit=10000,