grants/francis-gallery: rewrite as user follow-up
The brief doesn't match the only public Francis Gallery LA call (group
Summer Exhibition, deadline already passed) — restructure the note to
flag the mismatch up front and ask which of three readings applies
(passed group call / different solo opportunity / unsolicited proposal)
instead of leading with Summer Exhibition logistics.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>