add quota manager

app/config.py

@@ -34,8 +34,8 @@ class Settings(BaseSettings):
     # Gemini Configuration
     # Hỗ trợ nhiều API key và model cho Gemini
     # Định nghĩa biến môi trường: GEMINI_API_KEYS="key1,key2,..."; GEMINI_MODELS="model1,model2,..."
-    gemini_api_keys: list[str] = []
-    gemini_models: list[str] = []
+    gemini_api_keys: str = ""
+    gemini_models: str = ""
     gemini_base_url: str = os.getenv("GEMINI_BASE_URL", "https://generativelanguage.googleapis.com/v1") or ""
 
     # LLM (chat/completion) provider/model
@@ -48,19 +48,13 @@ class Settings(BaseSettings):
     rerank_provider: str = os.getenv("RERANK_PROVIDER", "") or llm_provider
     rerank_model: str = os.getenv("RERANK_MODEL", "") or llm_model
 
-    @field_validator("gemini_api_keys", mode="before")
-    @classmethod
-    def split_gemini_api_keys(cls, v):
-        if isinstance(v, str):
-            return [k.strip() for k in v.split(",") if k.strip()]
-        return v
+    @property
+    def gemini_api_keys_list(self):
+        return [k.strip() for k in self.gemini_api_keys.split(",") if k.strip()]
 
-    @field_validator("gemini_models", mode="before")
-    @classmethod
-    def split_gemini_models(cls, v):
-        if isinstance(v, str):
-            return [m.strip() for m in v.split(",") if m.strip()]
-        return v
+    @property
+    def gemini_models_list(self):
+        return [m.strip() for m in self.gemini_models.split(",") if m.strip()]
 
     class Config:
         env_file = ".env"

app/main.py

@@ -64,7 +64,7 @@ VEHICLE_KEYWORDS = ["xe máy", "ô tô", "xe đạp", "xe hơi"]
 llm_client = create_llm_client(
     provider="gemini",
     base_url=settings.gemini_base_url,
-    model=settings.gemini_models[0] if settings.gemini_models else "gemini-2.5-flash"
+    model=settings.gemini_models_list[0] if settings.gemini_models_list else "gemini-2.5-flash"
 )
 
 reranker = Reranker()

app/request_limit_manager.py

@@ -12,8 +12,8 @@ class RequestLimitManager:
     def _init_keys_models(self):
         settings = get_settings()
         if self.provider == "gemini":
-            self.api_keys: List[str] = getattr(settings, 'gemini_api_keys', [])
-            self.models: List[str] = getattr(settings, 'gemini_models', [])
+            self.api_keys: List[str] = getattr(settings, 'gemini_api_keys_list', [])
+            self.models: List[str] = getattr(settings, 'gemini_models_list', [])
         # Có thể mở rộng cho provider khác ở đây
         self.status: Dict[str, Dict[str, Dict[str, Union[str, float]]]] = {}
         now = time.time()