Description

As a Global Administrator for Bitbucket Data Center, I want to enforce a standardised Pull Request Auto-Decline policy (e.g., 4 weeks of inactivity) across the entire instance, so that Project and Repository admins cannot override or disable this cleanup mechanism.

Current Behavior:
Currently, the Auto-Decline feature follows a hierarchical override model (Global → Project → Repository). While a global default can be set in bitbucket.properties or the Admin UI, any user with Project or Repository Admin permissions can:

1. Disable the feature for their specific project/repo.

1. Change the inactivity threshold (e.g., extending it to 12 weeks or shortening it to 1 week).