fix: optimize queries for DocumentChangesFeed

[rjsparks]

Anecdote:

For /feed/document-changes/draft-ietf-roll-useofrplinfo, this cuts the number of queries from 1037 to 7, and reduces the overall time it takes to render the view to 31% of the current code in main.

Several other places pass a list instead of a queryset into augment_events_with_revision. If they can be modified to pass a queryset, they'll see a similar performance increase.

[rjsparks]

I pursued this optimization based on the traces Scout collected - this endpoint is very heavily utilized.

[codecov]

Codecov Report

Merging #5675 (4c2bc47) into main (f932239) will decrease coverage by 0.43%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##             main    #5675      +/-   ##
==========================================
- Coverage   89.15%   88.73%   -0.43%     
==========================================
  Files         287      285       -2     
  Lines       41207    39845    -1362     
==========================================
- Hits        36739    35357    -1382     
- Misses       4468     4488      +20     

Impacted Files	Coverage Δ
ietf/doc/utils.py	87.13% <62.50%> (-0.17%)	⬇️
ietf/doc/feeds.py	75.63% <100.00%> (ø)

... and 25 files with indirect coverage changes