Prevents the hourly poller from re-classifying the same "not for us"
tickets every hour and burning AI tokens on them forever.
New SKIP_LABEL='bot-skipped' is applied whenever the AI classifier
decides a ticket is out-of-scope (kind='skip', no store number, or an
unroutable kind). The JQL now excludes both bot labels while
preserving the `IS EMPTY OR` union so brand-new unlabeled tickets
still match. Transient failures (AI down, collector 5xx, comment
5xx) intentionally stay unlabeled so they retry next poll.
Labeling is wrapped in a non-throwing helper — a Jira 5xx on the
label call can't abort the batch; the ticket just gets one duplicate
classification next hour, which is far cheaper than dropping the poll.
jmcqueen
c15a471959