Proposed changes

Story: https://jira.newfold.com/browse/PRESS7-124

In cases of option updates, the option handler was processing a large number of concurrent updates, which overloaded the server with requests because the throttle could not intervene quickly enough. This PR introduces a WP Cron event that is scheduled whenever an option update occurs. The event triggers a single cache purge 60 seconds later, preventing multiple requests from overwhelming the server at once.

Type of Change

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Checklist

• I have read the CONTRIBUTING doc
• Linting and tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments