feat: DeepSeek v4 模型对齐、作业助手脚本与 Agent 对比测试

- 前端 WorkflowEditor/ModelConfigs/NodeTemplates：deepseek-v4-flash、v4-pro，弃用提示
- llm_service 默认 deepseek-v4-flash；workflow_engine 等与模型配置注入
- 作业管理脚本支持 AGENT_NAME 与 v4-pro；新增 compare_homework_agents 脚本
- 文档重命名为 (红头)项目核心文档汇总.md 并更新 DeepSeek 说明

Made-with: Cursor

backend/app/tasks/workflow_tasks.py

@@ -41,6 +41,19 @@ def _snapshot_to_jsonable(snapshot: dict) -> dict:
     return _json.loads(_json.dumps(snapshot, default=str))
 
 
+def _trusted_user_for_execution(db, execution: Optional[Execution]) -> Optional[str]:
+    """用于校验 LLM 节点引用的 model_configs 归属（与 Workflow / Agent 所有者一致）。"""
+    if not execution:
+        return None
+    if execution.agent_id:
+        ag = db.query(Agent).filter(Agent.id == execution.agent_id).first()
+        return ag.user_id if ag else None
+    if execution.workflow_id:
+        wf = db.query(Workflow).filter(Workflow.id == execution.workflow_id).first()
+        return wf.user_id if wf else None
+    return None
+
+
 @celery_app.task(bind=True)
 def execute_workflow_task(
     self,
@@ -80,12 +93,14 @@ def execute_workflow_task(
         
         # 创建工作流引擎（传入logger、db、合并后的执行预算）
         budget = merge_budget_for_execution(db, execution) if execution else {}
+        trusted_uid = _trusted_user_for_execution(db, execution)
         engine = WorkflowEngine(
             workflow_id,
             workflow_data,
             logger=execution_logger,
             db=db,
             budget_limits=budget,
+            trusted_model_config_user_id=trusted_uid,
         )
 
         max_retries = max(0, int(getattr(settings, "WORKFLOW_TASK_MAX_RETRIES", 0) or 0))
@@ -269,12 +284,14 @@ def resume_workflow_task(
         self.update_state(state="PROGRESS", meta={"progress": 0, "status": "running"})
 
         budget = merge_budget_for_execution(db, execution) if execution else {}
+        trusted_uid = _trusted_user_for_execution(db, execution)
         engine = WorkflowEngine(
             wf_key,
             workflow_data,
             logger=execution_logger,
             db=db,
             budget_limits=budget,
+            trusted_model_config_user_id=trusted_uid,
         )
         max_retries = max(0, int(getattr(settings, "WORKFLOW_TASK_MAX_RETRIES", 0) or 0))
         result: Optional[dict] = None