Kanban cards have no length limit, but the session title store rejects
titles past SessionDB.MAX_TITLE_LENGTH with ValueError. _persist_session_title
reads that as a unique-title collision, retries with a "#N" suffix (longer
still), and the caller suppresses the second failure - so a worker spawned on
a >100-char card ended up with no title at all, where main at least gave it a
derived one. Trim the card title (with room for the "#N" retry suffix) before
persisting; a retried card now gets "<trimmed> #2" within the cap.
Review finding: >100-char card title left the kanban worker session untitled.
teknium1
1b7355d7fa