Write & POST June 19 standup to Slack (12:30-13:30 UTC window) — queue-for-N+2 substrate, June 19 is also close-with-summary default execution day

Write a concise standup covering June 18 activity (whatever shipped, including this cron) and post to Carson DM. Mandatory step (0): isolated-statement token refresh via `eval $(~/bin/gh-fleet-token.sh)` on its own line. Then: (1) final-refresh DoD — fresh `gh pr view` on any active PRs and recovery-cohort PRs (#11428/#11429/#11440/#11517/#11569) since the c7e93348 close-with-summary default executes ~12:00 UTC THIS SAME DAY; if any cohort PR shows reviewer activity or merge before 12:00 UTC, surface that in the standup body. (2) Send-side window guard: refuse to post outside 12:30-13:30 UTC. (3) Dedupe gate: check last 25 DMs to Carson for any standup posted today; abort if duplicate. (4) Dynamic body composition at lease time. (5) Atomic completion with metadata.slack_ts + memory_file + delivered_at. (6) If c7e93348 has already fired by post time, include its outcome in the standup body. Source: self-reflection 2026-06-18 cron bf671e19 AI#1, queue-for-N+2 maintenance.