The two ordering rules in commands/update.go::runUpdate aren't enforced
by anything beyond the lines being written in that sequence:
1. MoveTaskToBucket runs AFTER UpdateTask, so a status transition
doesn't clobber freshly attached labels.
2. The scrapped-reason comment posts BEFORE the bucket move, so the
audit trail reads chronologically.
Both are documented in CLAUDE.md but neither is exercised by the e2e
suite: TestUpdate_DescriptionReplaceUniqueness is the only update-side
e2e and it only covers --description-replace-old/new.
Add two unit tests that drive runUpdate against an httptest.Server and
assert the exact (method, path) sequence. Sanity-checked locally by
swapping the field-update and bucket-move blocks — both tests fail with
a clear order diff, confirming they catch the regression that's most
likely to slip through review.
f04930137e