ae4f2640ad
dm_send already knows the thread UUID at send time (alias resolution, nav URL capture, autoprovision capture) but dropped it: the only stdout channel the board parses carried no thread info, so every auto-logged DM row had thread_uuid null. Now prints '... SENT and VERIFIED thread=<uuid>' when known, unchanged line otherwise (main-chat sends, UUID-capture failures stay honestly null -- never fabricated). Backward compatible: board _BOX_DM_SENT_RE has no end anchor; bl consumers (job-dispatch.py, siphon-bl.py) use substring matching. Worktree note: unrelated uncommitted changes remain (job_id followup-correlation hunks in this file, followup-sweeper.py, response-harvester.py, untracked helpers) -- not mine, not staged. Session: sidechat/box-dms-ui