Option to prevent bar numbers overhanging the ends of a system

Your idea

When I've turned on bar numbers at every bar, and used text alignment to centre them over the bar lines, I'd like an option (hopefully turned on by default) to not have them overhanging the system into the margins.

This is separate from the existing horizontal placement of bar numbers at the left, middle, or right of the bar.

Problem to be solved

At present, there are many collisions between bar numbers and other objects like notes and accidentals in the score that must be fixed with object offsets. While I've reported a bug to make this automatic (#20009), using the text style to centre the bar numbers directly over the bar line saves space and makes this job easier (and would for an algorithm), but then I have numbers hanging into the left margin which again need to be fixed individually, and might move if the system breaks change.

Bar 17 has its number positioned where I'd like it, but bar 16's number should be able to be moved in automatically to be flush with the margin.

Prior art

No response

Additional context

At present there are options to position the numbers at the left of the bar, the centre of the bar, or at the right of the bar. You can use the text style alignment to affect whether the bar numbers are at the right, middle, or left of the position with left, centre, and right alignment respectively.

No files, tests, or entry points are named. Start by reproducing the bar-number placement described in the issue, then trace the existing left, centre, and right positioning and text alignment options. Done means an option prevents bar numbers from extending into the system margins while preserving the existing placement choices.