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/api/project_routes.py

@@ -3,18 +3,18 @@
 from __future__ import annotations
 
 from pathlib import Path
-from typing import Any, Dict
+from typing import Any, Dict, List, Optional
 
 from fastapi import APIRouter, HTTPException, Query
 
 from src.blackboard.registry import ProjectRegistry
-import src.utils as _utils
+from src.utils import get_data_root
 
 router = APIRouter(prefix="/api/projects", tags=["projects"])
 
 
 def _registry() -> ProjectRegistry:
-    return ProjectRegistry(_utils.get_data_root())
+    return ProjectRegistry(get_data_root())
 
 
 @router.get("")
@@ -76,7 +76,7 @@ async def list_projects():
 async def create_project(body: Dict[str, Any]):
     reg = _registry()
     try:
-        reg.create_project(
+        info = reg.create_project(
             body["id"], body["name"],
             agents=body.get("agents", []),
             description=body.get("description", ""),