fix: clear stuck claimed_by tasks

wwwroot/api/fix_stuck.dspy

@@ -0,0 +1,26 @@
+# fix_stuck.dspy - 清除卡住任务的 claimed_by
+
+dbname = get_module_dbname('pipeline-sdlc')
+async with DBPools().sqlorContext(dbname) as sor:
+    # 清除 submitted 状态但有 claimed_by 的僵尸任务
+    result = await sor.sqlExe(
+        "UPDATE pipeline_tasks SET claimed_by=NULL WHERE state='submitted' AND claimed_by IS NOT NULL",
+        {})
+    # 同时清除 review 状态但有 claimed_by 的（超时未处理的）
+    result2 = await sor.sqlExe(
+        "UPDATE pipeline_tasks SET claimed_by=NULL WHERE state='review' AND claimed_by IS NOT NULL",
+        {})
+    
+    # 查看还有多少卡住的
+    stuck = await sor.sqlExe(
+        "SELECT id, title, role, state, claimed_by FROM pipeline_tasks WHERE claimed_by IS NOT NULL",
+        {})
+    
+result = {
+    "cleared_submitted": "done",
+    "cleared_review": "done",
+    "remaining_stuck": [{"id": getattr(t,'id','')[:12], "state": getattr(t,'state',''),
+                         "claimed_by": getattr(t,'claimed_by','')[:8]} for t in (stuck or [])]
+}
+
+return json.dumps(result, ensure_ascii=False)