Two agents could start on one issue without seeing each other, and an issue could be resolved without anyone having said they started its fix. Adds the status fixing, the issue's worker (by, who@node) with take-over and a stale bound, and resolved only from fixing; settles what to-be 53 left out as claims, under the new glossary word worker. Amends to-be 53, playbook 03 and the hq-diagnose and hq-status skills, with pointer notes on ADR 0275 and 0281.