Support enforcing "directly on the target branch(es)" before merging
Some MRs should be done directly to a branch without any intervening MRs having been merged in the meantime. There should be a trailer one can add to the description to enforce this.
Examples include:
- reformatting sweeps
- API uplifts
- CI reworking
but will be at the developer's discretion.
Cc: @brad.king