feat: store discord user ids on accounts

app/schemas/schemas.py

@@ -171,6 +171,7 @@ class UserBase(BaseModel):
 class UserCreate(UserBase):
     password: Optional[str] = None
     role_id: Optional[int] = None
+    discord_user_id: Optional[str] = None
     # Agent binding (both must be provided or both omitted)
     agent_id: Optional[str] = None
     claw_identifier: Optional[str] = None
@@ -182,6 +183,7 @@ class UserUpdate(BaseModel):
     password: Optional[str] = None
     role_id: Optional[int] = None
     is_active: Optional[bool] = None
+    discord_user_id: Optional[str] = None
 
 
 class UserResponse(UserBase):
@@ -191,6 +193,7 @@ class UserResponse(UserBase):
     role_id: Optional[int] = None
     role_name: Optional[str] = None
     agent_id: Optional[str] = None
+    discord_user_id: Optional[str] = None
     created_at: datetime
     
     class Config: