添加API密钥管理、模型服务和安全服务，并优化FastAPI应用程序配置

app/core/config.py

@@ -0,0 +1,16 @@
+from pydantic_settings import BaseSettings
+from typing import List
+
+
+class Settings(BaseSettings):
+    API_KEYS: List[str]
+    ALLOWED_TOKENS: List[str]
+    BASE_URL: str = "https://generativelanguage.googleapis.com/v1beta"
+    MODEL_SEARCH: List[str] = ["gemini-2.0-flash-exp"]
+    TOOLS_CODE_EXECUTION_ENABLED: bool = False
+
+    class Config:
+        env_file = ".env"
+
+
+settings = Settings()