Enable Discord invite route for new applications

[coderabbitai]

Context

This issue tracks the changes made in PR #2582 to enable the Discord invite route for users.

Change Summary

The disableRoute middleware has been removed from the GET /invite route in the Discord actions router. This allows users to retrieve their Discord invite links.

Rationale

New applications are opening and users should be able to get their invite links through this endpoint.

Reference

• PR: refactor: remove short-circuit middleware from Discord invite route #2582
• Requested by: @AnujChhikara