chore: init monorepo snapshot

wolai-backend/app/services/lightrag_service.py

@@ -0,0 +1,19 @@
+"""LightRAG 集成占位。阶段 1 会在这里封装真正的查询与索引。"""
+
+from app.config import settings
+
+
+class LightRAGService:
+    def __init__(self) -> None:
+        self.collection = settings.lightrag_collection
+
+    async def queue_index(self, document_id: str, raw_text: str) -> None:
+        """预留方法：后续调用 LightRAG.update_index。"""
+        return None
+
+    async def query(self, query_text: str, user_id: str) -> str:
+        """预留方法：后续调用 LightRAG.query，当前返回占位回答。"""
+        return f"[mock] {query_text}"
+
+
+lightrag_service = LightRAGService()