feat: Add base project structure with API and web components

api/app/controllers/service/rag_api_controller.py

@@ -0,0 +1,16 @@
+"""RAG 服务接口 - 基于 API Key 认证"""
+from fastapi import APIRouter, Depends
+from sqlalchemy.orm import Session
+
+from app.db import get_db
+from app.core.response_utils import success
+from app.core.logging_config import get_business_logger
+
+router = APIRouter(prefix="/knowledge", tags=["V1 - RAG API"])
+logger = get_business_logger()
+
+
+@router.get("")
+async def list_knowledge():
+    """列出可访问的知识库（占位）"""
+    return success(data=[], msg="RAG API - Coming Soon")