Repo may need to go on a diet again

[stucka]

Actions are moving slower and some routine stuff fails sometimes, e.g.:
Fetching the repository
/usr/bin/git -c protocol.version=2 fetch --prune --no-recurse-submodules origin +refs/heads/:refs/remotes/origin/ +refs/tags/:refs/tags/
Error: error: RPC failed; curl 92 HTTP/2 stream 0 was not closed cleanly: CANCEL (err 8)
Error: error: 2831 bytes of body are still expected
fetch-pack: unexpected disconnect while reading sideband packet
Error: fatal: early EOF
Error: fatal: fetch-pack: invalid index-pack output
The process '/usr/bin/git' failed with exit code 128
Waiting 13 seconds before trying again

git-sizer reports the repo has gotten quite large again:

Name	Value	Level of concern
Overall repository size
* Blobs
* Total size	32.9 GiB	***
Biggest objects
* Trees
* Maximum entries [1]	2.15 k	**
* Blobs
* Maximum size [2]	13.8 MiB	*

The notes on shrinking the repo in #7 were never actually turned into useful documentation.

[stucka]

Now 42.5 GiB.

[stucka]

Repo size on disk knocked down 92%. Performance vastly increased.

Branches cleaned up 6/24/2024:

18038832 refs/remotes/origin/dc
18203431 refs/remotes/origin/vt
27108603 refs/remotes/origin/co
31563529 refs/remotes/origin/ca
33104387 refs/remotes/origin/ok
43845782 refs/remotes/origin/nm
51030901 refs/remotes/origin/ks
65325721 refs/remotes/origin/ky
70276832 refs/remotes/origin/az
96548777 refs/remotes/origin/me
333931979 refs/remotes/origin/wa
435718337 refs/remotes/origin/il
582069999 refs/remotes/origin/transformer

Branches NOT cleaned up 6/24/2024:
6963 refs/remotes/origin/ak
29528 refs/remotes/origin/ut
53318 refs/remotes/origin/sd
53580 refs/remotes/origin/hi
66334 refs/remotes/origin/al
134689 refs/remotes/origin/ct
291668 refs/remotes/origin/wi
348199 refs/remotes/origin/origin/wa
414156 refs/remotes/origin/mt
802293 refs/remotes/origin/id
1069308 refs/remotes/origin/ne
1523234 refs/remotes/origin/md
1540321 refs/remotes/origin/in
1811925 refs/remotes/origin/mi
2359496 refs/remotes/origin/tn
2804939 refs/remotes/origin/fl
3229237 refs/remotes/origin/ga
3673777 refs/remotes/origin/mo
4216396 refs/remotes/origin/tx
4833845 refs/remotes/origin/nj
5333310 refs/remotes/origin/or
6437243 refs/remotes/origin/la
6469633 refs/remotes/origin/sc
6500019 refs/remotes/origin/va
6663005 refs/remotes/origin/ny
7415177 refs/remotes/origin/ri
8531617 refs/remotes/origin/ia
8673717 refs/remotes/origin/de
17197681 refs/remotes/origin/oh

[stucka]

Better documentation at the end of #7