Initial commit: clean project structure

- Backend: FastAPI + SQLAlchemy + Celery (Python 3.11+)
- Frontend: Vue 3 + TypeScript + Pinia + Tailwind
- Admin Frontend: separate Vue 3 app for management
- Docker Compose: 9 services orchestration
- Specs: design prototypes, memory system PRD, product roadmap

Cleanup performed:
- Removed temporary debug scripts from backend root
- Removed deprecated admin_app.py (embedded UI)
- Removed duplicate docs from admin-frontend
- Updated .gitignore for Vite cache and egg-info

backend/app/api/admin_reload.py

@@ -0,0 +1,14 @@
+from fastapi import APIRouter, Depends
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.admin_auth import admin_guard
+from app.db.database import get_db
+from app.services.provider_cache import reload_providers
+
+router = APIRouter(dependencies=[Depends(admin_guard)])
+
+
+@router.post("/providers/reload")
+async def reload(db: AsyncSession = Depends(get_db)):
+    cache = await reload_providers(db)
+    return {k: len(v) for k, v in cache.items()}