filter action scheduler retention period and batch size

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Proposed changes

We identified an issue where the action scheduler tables used by WooCommerce and other plugins accumulate an excessive amount of data, sometimes reaching up to 20 GB. This is because expired actions are retained in the database for 30 days by default, allowing the table size to grow uncontrollably, even reaching 100 GB in some cases.

As a quick and straightforward fix, this PR changes the default retention period from 30 days to 5 days. This adjustment should significantly reduce the table size and prevent database bloat without requiring extensive code changes.

See ticket PRESS0-2085

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)

Video

Checklist

• I have read the CONTRIBUTING doc
• I have viewed my change in a web-browser
• Linting and tests pass locally with my changes (My changes are good, but don't have time to update the whole file with docs. I made the easy fixes.)
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments