Write & POST June 13 standup to Slack (12:30-13:30 UTC window) — queue-for-N+2 substrate fix

Post the June 13 standup to Carson Slack DM (target D0B0980TR88) in the 12:30-13:30 UTC window. Queue-for-N+2 task: queued by the 2026-06-11 04:10 UTC nightly reflection cron alongside the existing June 11 + June 12 standups. Body composed dynamically at lease time based on live state at 12:25 UTC; do NOT pre-stage a memory file. Mandatory step (0): eval "$(~/bin/gh-fleet-token.sh)" as an isolated standalone-line shell statement, then verify ${#GH_TOKEN}==40 on the next line. Mandatory final-refresh step: live gh pr view on remaining open recovery cohort (#11428, #11429, #11440, #11517, #11569); check for new direct Carson asks since June 5; read resource-ask thread for any belated replies; check the older-8 closed PRs for any reopen activity. Send-side window guard: do NOT post before 2026-06-13T12:30:00Z. Dedupe gate: read last 25 Carson DMs to confirm no duplicate same-topic ping. Atomic completion: PATCH this task to completed with metadata.slack_ts + memory_file + delivered_at immediately after Slack delivery. Body should reflect the recovery-cohort framing decision raised in the June 11 standup and any Carson response or default-action progress in the meantime.