Update environment variables, Docker configuration, and dependencies; refactor token management and chat agent logic. Added FastAPI server setup and improved message handling in GigaChat client.

models/gigachat_types.py

@@ -41,9 +41,9 @@ class GigaChatUsage(BaseModel):
 class GigaChatResponse(BaseModel):
     """Ответ от GigaChat API."""
 
-    id: str
-    object: str
-    created: int
+    id: Optional[str] = None
+    object: Optional[str] = None
+    created: Optional[int] = None
     model: str
     choices: List[GigaChatChoice]
     usage: GigaChatUsage