DM-42076: Add script for one-shot collections migration

[andy-slac]

New script migrates schema from NameKeyCollectionManager to SynthIntKeyCollectionManager, replacing collection names with integer IDs. Tested on a copy of main repo at USDF.

Checklist

• added documentation for a new migration script

[codecov-commenter]

Codecov Report

Attention: 38 lines in your changes are missing coverage. Please review.

Comparison is base (59d4c9b) 56.02% compared to head (a3771cf) 54.37%.

Files	Patch %	Lines
python/lsst/daf/butler_migrate/naming.py	0.00%	29 Missing ⚠️
.../lsst/daf/butler_migrate/script/migrate_history.py	0.00%	9 Missing ⚠️

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #29      +/-   ##
==========================================
- Coverage   56.02%   54.37%   -1.66%     
==========================================
  Files          32       33       +1     
  Lines        1112     1144      +32     
  Branches      254      256       +2     
==========================================
- Hits          623      622       -1     
- Misses        455      488      +33     
  Partials       34       34              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[timj]

I'm not going to pretend I looked at every line, but I did look at the algorithmic section and it looked okay.