docs(morning): Sunday brief — 15 tracks, 10 of them changed, and what to hear

J-6, the one-before-last KRK rehearsal. Per-track watch list for the 1h30 run,
because ten of the fifteen tracks have something in them PLN has never heard:
seven new d10 risers, the take_5_drops d5 structure fix, ouais_je_funk's d10
finally mutable, lime_tacos' cymbals relocated to d12, and two tracks that were
not in any tool's idea of the set until yesterday.

Also carries the fresh ghost matrix (9 of 14 transitions, 18 orphans) recomputed
on the real 15-track order — and the pleasant surprise that adding the two
missing tracks produced the longest clean stretch in the set,
piment -> ouais -> lime -> perfect.