Re-ping Victor on chatty-trailer fix — June 5 proposal did not land, 6/8 dispositive evidence available

Per LEARNINGS.md 2026-06-09 + 2026-06-06 fix-live-not-DM-sent rule. ORIGINAL PROPOSAL: 2026-06-05 04:51 UTC Slack DM ts 1780635072.792059 to Victor (U05A72893B2). Proposed `delivery.mode: announce → none` on cron `bdf90e4d-ffff-4b3b-a590-4523d2310d64` to eliminate chatty-trailer leak after standup body. DISPOSITIVE EVIDENCE: 2026-06-08 14:30 UTC standup leaked again. D0ATM82H3T8 received: - 1780929041.026069 (14:30:41 UTC) — standup body, correct - 1780929046.948559 (14:30:46 UTC) — chatty trailer: "Perfect! The standup has been successfully sent to Stefan's DM channel (D0ATM82H3T8) at timestamp 1780929041.026069 and written to the standups file. The delivery worked correctly — the message landed in the DM channel as intended." This is the 4th leaked-trailer day (6/2, 6/3, 6/4, 6/8). The June 5 DM proposal did not become a fix. HEARTBEAT-CRON: if you are reading this task: 1. If now < metadata.evaluate_after (2026-06-09T13:00:00Z): NO_OP. Do not PATCH, do not send any Slack message. 2. If now >= metadata.evaluate_after: a. Read D0ATM82H3T8 to confirm whether today's 14:30 UTC standup ALSO leaked (independent observation). If today's standup hasn't fired yet (before 14:30 UTC), proceed with the re-ping anyway using only the 6/8 evidence. b. Send ONE Slack DM to U05A72893B2 with: - Reference to original proposal ts 1780635072.792059 (June 5 04:51 UTC) - 6/8 dispositive evidence (both ts above + the actual trailer text) - Plain framing: 'Wanted to surface that the 6/8 standup leaked the same trailer pattern, so the proposed delivery.mode flip evidently didn''t land. Happy to draft the cron config patch if that''s easier than configuring through whatever path you''d normally use.' - NO escalation language. NO emojis-as-emphasis. NO urgency markers. - Per May 14 no-manufactured-urgency rule. c. PATCH this task to completed with the new Slack DM ts as result. 3. If reading after Tuesday 14:30 UTC standup fired CLEAN (no trailer), PATCH this task completed with result='superseded by clean delivery 2026-06-09 14:30 UTC standup — fix evidently landed before re-ping needed' and do NOT send the DM. Do NOT batch this with the four older Victor DMs from June 6 (those are in their own no_recurring_nag cooldown). This is a single-subject re-ping on the chatty-trailer DM specifically. Priority 2 — not a fire, but the pattern is established (4 of 7 standup-days leaked, root cause known, fix proposed >72h ago). Per May 18 indecisive-defer rule, the right move is one measured re-ping with new evidence, not silent re-watching. SEE: LEARNINGS.md 2026-06-09 (this entry context), LEARNINGS.md 2026-06-08 (A/B/C), LEARNINGS.md 2026-06-06 (fix-live-not-DM-sent rule), LEARNINGS.md 2026-06-05 (original proposal + chatty-trailer root cause), LEARNINGS.md 2026-05-14 (no-manufactured-urgency).