Allow Configurable Group Member Limit for SMS Notifications

Introduce a configurable setting to increase the current group member limit of 30 users for SMS notifications. At present, SMS notifications are restricted to groups with up to 30 members, and there is no mechanism for developers or administrators to adjust this threshold based on their application’s requirements. This limitation impacts larger communities and enterprise use cases where SMS notifications are critical for user engagement and message delivery. Providing a configurable limit—either at the app, group, or account level—would offer greater flexibility, enable support for larger groups, and allow customers to balance notification reach, cost, and performance according to their specific needs.