Detect short acknowledgment comments that don't need code or a status change.
Such a comment does not mark the PR as needing attention, so a thanks-only
comment never reaches pr-responder's appreciation rule (#1852 follow-up).
Returns true only when: no question mark, matches an acknowledgment keyword, and under 100 chars.
Conservative -- missing a real acknowledgment (false negative) is safer than suppressing a substantive response (false positive).
Detect short acknowledgment comments that don't need code or a status change. Such a comment does not mark the PR as needing attention, so a thanks-only comment never reaches pr-responder's
appreciationrule (#1852 follow-up). Returns true only when: no question mark, matches an acknowledgment keyword, and under 100 chars. Conservative -- missing a real acknowledgment (false negative) is safer than suppressing a substantive response (false positive).