Add service platform foundation

app/schemas/user.py

@@ -10,6 +10,7 @@ class UserUpsert(BaseModel):
     last_name: str | None = None
     locale: str | None = None
     currency: str | None = None
+    platform_role: str | None = None
 
 
 class WebAppAuthRequest(BaseModel):
@@ -27,7 +28,7 @@ class TelegramLoginRequest(BaseModel):
 
 
 class AuthConfig(BaseModel):
-    bot_username: str
+    bot_username: str | None = None
     vapid_public_key: str | None = None
     app_env: str
     allow_dev_auth: bool = False