fix: 修复 endpoints 模块导入路径

- progress.py: get_db, get_current_user 从 app.core.deps 导入
- speech.py: 同上
- recommendation.py: 同上

backend/app/api/v1/endpoints/recommendation.py

@@ -6,8 +6,7 @@ from fastapi import APIRouter, Depends, Query
 from sqlalchemy.ext.asyncio import AsyncSession
 from pydantic import BaseModel
 
-from app.core.database import get_db
-from app.api.deps import get_current_user
+from app.core.deps import get_db, get_current_user
 from app.models.user import User
 from app.services.recommendation_service import RecommendationService