Fix: Added the backend validation for name (#3878)

- Added the backend validation for name
- Add message size constraint

app/models/user.rb

@@ -68,7 +68,7 @@ class User < ApplicationRecord
   # validates_uniqueness_of :email, scope: :account_id
 
   validates :email, :name, presence: true
-  validates_length_of :name, minimum: 1
+  validates_length_of :name, minimum: 1, maximum: 255
 
   has_many :account_users, dependent: :destroy_async
   has_many :accounts, through: :account_users