DM-40057: shorten deprecation timeline and add ticket TODOs

[TallJimbo]

Checklist

• ran Jenkins
• added a release note for user-visible changes to doc/changes

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (32b72e6) 82.78% compared to head (6d61753) 82.78%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #358   +/-   ##
=======================================
  Coverage   82.78%   82.78%           
=======================================
  Files          66       66           
  Lines        7255     7255           
  Branches     1418     1418           
=======================================
  Hits         6006     6006           
  Misses       1001     1001           
  Partials      248      248           

Impacted Files	Coverage Δ
python/lsst/pipe/base/_quantumContext.py	86.39% <ø> (ø)

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.