修改 deepseek 至火山引擎

app/core/config/settings/deepseek.py

@@ -6,7 +6,7 @@ class DeepSeekConfig(BaseSettings):
     """DeepSeek API 配置"""
 
     api_key: str = Field(
-        default="sk-cfd2df92c8864ab999d66a615ee812c5", description="DeepSeek API Key"
+        default="", description="DeepSeek API Key"
     )
     reasoner_model: str = Field(
         default="deepseek-reasoner", description="DeepSeek 推理模型"