feat(conversations): align custom attribute response

internal/handler/api/v1/conversation_handler.go

@@ -744,7 +744,7 @@ func (h *ConversationHandler) UpdateCustomAttributes(c *gin.Context) {
 		return
 	}
 
-	c.JSON(http.StatusOK, serializeConversation(c.Request.Context(), h.conversationSvc.DB(), conversation))
+	c.JSON(http.StatusOK, gin.H{"custom_attributes": conversation.CustomAttributes})
 }
 
 // ListAttachments returns paginated message attachments for a conversation.

internal/handler/api/v1/conversation_handler_test.go

@@ -327,13 +327,16 @@ func (s *ConversationHandlerTestSuite) TestUpdateCustomAttributes_Success() {
 	assert.Equal(s.T(), http.StatusOK, w.Code)
 
 	var resp struct {
-		ID               uint                   `json:"id"`
 		CustomAttributes map[string]interface{} `json:"custom_attributes"`
 	}
 	err := json.Unmarshal(w.Body.Bytes(), &resp)
 	assert.NoError(s.T(), err)
-	assert.Equal(s.T(), s.testConv.ID, resp.ID)
 	assert.Equal(s.T(), "vip_customer", resp.CustomAttributes["priority_reason"])
+	var rawResp map[string]interface{}
+	err = json.Unmarshal(w.Body.Bytes(), &rawResp)
+	assert.NoError(s.T(), err)
+	assert.NotContains(s.T(), rawResp, "id")
+	assert.NotContains(s.T(), rawResp, "success")
 }
 
 func (s *ConversationHandlerTestSuite) TestUpdateCustomAttributes_InvalidAccountID() {