In addition to the suggestions arlready made ...

In Trac, resolutions are currently

[ ] fixed
[ ] invalid
[ ] wontfix
[ ] duplicate
[ ] worksforme

Enhance that first item, maybe

[ ] fixed but not change-logged
[ ] fixed and logged

YMMV but for me that's around line 356 of
/usr/share/python-support/trac/trac/db_default.py

So: the few people who are inclined to manually update the change log can quickly and easily draw the required information from Trac, or from the underlying database.

It won't help you right now, but it could streamline things for the future.