Gloria Zhao

I can see the `self.shutdown()` traceback in this one: https://api.cirrus-ci.com/v1/task/6740372997537792/logs/ci.log

Thank you @maflcko!

cc @sdaftuar @instagibbs @t-bast

Ah so (900 + 172 * 483 * 2 + 224) / 4 = 41819vB? So maybe a better number is 42KvB or 50KvB.

I've changed the limit to 10KvB. This means the maximum v3 package vsize is 11KvB. The `test_nondefault_package_limits` descendant limit test hit a snag (CPFP carve out grants a free +10kvB...

Thanks @murchandamus, addressed nits

backported to 26.x in #29899

cc @josibake @instagibbs @naumenkogs @darosior @murchandamus since you reviewed the last time

Will fix the linter when I rebase

Thanks @instagibbs @theStack @sr-gi! Addressed the comments and added a few minor log improvements.