+1 maintenance report

[Matthias Klose]

My second +1 shift in the hirsute cycle (working on fixing python 3.9 related
ftbfs during the first shift):

 - started earlier this week with ocaml binNMUs.
   uploads are all done, waiting for autopkg tests

 - cleared up all "old binaries left" in -proposed,
   no-change uploads in cases of transitions.

 - identified a dozen transitions, and uploaded
   no-change builds to rebuild with those

 - retried ocaml related autopkg tests.

I didn't see anything migrating what I started to fix ...

Major problem now is the huge backlog for autopkg tests on armhf and arm64.
It's worse than before, and likely not clearing out for the next two weeks,
connecting more and more transitions ...

Matthias