V-notch reminder-with-default DM on PR #11790 at 2026-06-17 ~13:00 UTC if no Richie response

First enforcement of the reminder-with-default rule (born 2026-06-17 reflection). The V-notch preview-gif reminder (0397e5f8) fired at 13:13 UTC on 2026-06-16. Richies last engagement with the V-notch thread (Slack ts 1781538011.181389) was Sunday 22:55 UTC saying Ill send tomorrow, just remind me. Three tomorrows have now passed. PR #11790 is still CONFLICTING with main (Stefan ALL-1777 merge). At heartbeat after 2026-06-17 13:00 UTC, if NO Richie engagement on the V-notch thread since 22:55 UTC 2026-06-15, send a single short reminder-with-default DM: V-notch reminder #2 — Ill rebase #11790 onto main by EOD UTC unless youd rather close. (Conflicts with Stefans ALL-1777 merge, so the rebase is non-trivial — wanted to surface before sinking the time.) Do NOT send a third gif-reminder. Do NOT defer again. This is the SECOND-order escalation of the gif reminder, not the first-order. If Richie HAS responded by heartbeat time, mark this completed with the outcome. Reference: LEARNINGS 2026-06-17 reminder-with-default rule.