feat(orders): integrate Pally payment and order management

schemas/dto.py

@@ -1,4 +1,7 @@
 from dataclasses import dataclass
+from typing import Literal
+
+from db.models.users import User
 
 
 @dataclass
@@ -6,3 +9,10 @@ class KeyPair:
     access_token: str
     refresh_token: str
     expires_at: float
+
+
+@dataclass
+class AuthContext:
+    user: User
+    auth_method: Literal["jwt"]
+    service: str | None = None