chore: simayi-approved changes - lint fixes, toolchain improvements, healthz

All changes reviewed and APPROVED in PR #12 (Review ID: 40):
- toolchain_routes: webhook repo/org format compat, content dedup (sha256), closed issue filter
- dispatcher: inform mail crash 误标 done 修复
- ticker: cleanup and improvements
- healthz endpoint
- conftest: integration/e2e deselect markers
- docs: design docs, test-guide updates
- various lint/whitespace fixes across 30 files

src/daemon/spawner.py

@@ -1373,13 +1373,11 @@ curl -X POST http://{api_host}:{api_port}/api/projects/{project_id}/tasks/{task_
             # A17: 真正的 crash → 保持 working,ticker 兜底
             return {"outcome": "crashed", "should_retry": False, "original": "process_crash"}
 
-        # stdout 为空但 exit=0:可能是正常完成但 --json 没输出
-        # 查任务状态判断
+        # A13 revised: stdout 为空但 exit=0 → 信任进程退出码，视为正常完成
+        # 实测发现 openclaw session=None + exit=0 是正常场景（inform 通知等）
+        # 旧逻辑按 task_status 区分，非终态判 agent_error → 导致 inform 邮件永不标 done
         if status is None and not stdout_text.strip() and exit_code == 0:
-            terminal_statuses = {"done", "review"}
-            if task_status in terminal_statuses:
-                return {"outcome": "completed", "should_retry": False}
-            return {"outcome": "agent_error", "should_retry": False}
+            return {"outcome": "completed", "should_retry": False}
 
         # A7-A12: status=error → 不续杯,stderr 辅助分类
         if status == "error":