{"worker":"positron-backlog","what":"the history the verbatim relay refuses to keep — a recorder joins the room as a socket","usage":["POST /room/<name>/record  {cap}","GET  /room/<name>/history?last=200","GET  /room/<name>/history?since=<epoch ms>","GET  /room/<name>/history?from=<ms>&to=<ms>&type=<verb>","GET  /room/<name>/stats","POST /room/<name>/clear","POST /clear-all"],"retention":{"cap":1000,"keepMs":86400000,"idleStopMs":1800000},"stores":"only messages sent with store:true — plus every binary frame, which cannot carry the flag"}