Add minutes for the 2026-06-26 Core Maintainers meeting

These are AI generated (Gemini 3.5 Thinking). I have included the
full transcript as well so there is a further source of truth in
the event of error in the AI summary, but it seemed reasonably
accurate when I reviewed it.

Signed-off-by: Matt Heon <mheon@redhat.com>

Author: mheon