feat: Improved password security policy (#2345)

Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

app/controllers/api/v1/accounts/agents_controller.rb

@@ -58,9 +58,10 @@ class Api::V1::Accounts::AgentsController < Api::V1::Accounts::BaseController
   end
 
   def new_agent_params
-    time = Time.now.to_i
+    # intial string ensures the password requirements are met
+    temp_password = "1!aA#{SecureRandom.alphanumeric(12)}"
     params.require(:agent).permit(:email, :name, :role)
-          .merge!(password: time, password_confirmation: time, inviter: current_user)
+          .merge!(password: temp_password, password_confirmation: temp_password, inviter: current_user)
   end
 
   def agents