feat: support upstream token refresh

backend/app/schemas/upstream.py

@@ -5,6 +5,9 @@ from pydantic import BaseModel, Field
 
 class AuthConfigBearer(BaseModel):
     token: str = ""
+    refresh_token: str = ""
+    expires_in: Optional[int] = None
+    token_expires_at: Optional[int] = None
 
 
 class AuthConfigApiKey(BaseModel):
@@ -16,13 +19,14 @@ class AuthConfigLoginPassword(BaseModel):
     email: str = ""
     password: str = ""
     login_path: str = "/auth/login"
+    username_field: str = "email"
 
 
 class UpstreamCreate(BaseModel):
     name: str
     base_url: str
     api_prefix: str = "/api/v1"
-    auth_type: str = "login_password"  # none | bearer | api_key | login_password
+    auth_type: str = "login_password"  # none | bearer | new_api_token | nox_token | api_key | cookie | login_password
     auth_config: dict[str, Any] = {}
     rate_endpoint: str = "/groups/rates"
     groups_endpoint: str = "/groups/available"