chore: init monorepo snapshot

services/rag_gateway/app/api/routes.py

@@ -0,0 +1,46 @@
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel, Field
+
+from app.services.rag_service import RagService
+
+router = APIRouter()
+rag_service = RagService()
+
+
+class QueryRequest(BaseModel):
+    query: str = Field(..., description="用户查询")
+    top_k: int = Field(8, description="返回条数")
+
+
+class PathRequest(BaseModel):
+    source: str
+    target: str
+
+
+@router.post("/query")
+async def query(payload: QueryRequest):
+    """优先调用 LightRAG，失败自动降级 Supabase"""
+    result = await rag_service.query(payload.query, payload.top_k)
+    return {"data": result}
+
+
+@router.post("/graph")
+async def graph(payload: QueryRequest):
+    result = await rag_service.graph(payload.query)
+    return {"data": result}
+
+
+@router.post("/path")
+async def path(payload: PathRequest):
+    result = await rag_service.path(payload.source, payload.target)
+    return {"data": result}
+
+
+@router.get("/health/full")
+async def health() -> dict:
+    """最小化健康检查，后续补充依赖自检"""
+    try:
+        _ = await rag_service.query("ping", top_k=1)
+        return {"status": "ok"}
+    except Exception as exc:  # noqa: BLE001
+        raise HTTPException(status_code=500, detail=str(exc))