Embodies the division-of-labor principle: the machine flags OBJECTIVE boundary
leaks so PLN's ears judge only feel. Detector = exclusive-orbit ignition: at each
cut, an orbit core to one neighbour but not the other, lit on the wrong side (down
to a sensitive -55dB floor for quiet foreign onsets).

Validated on Take89 (Montreuil): independently caught BOTH of PLN's hand-flagged
bad_cuts — cut1 (Take5 bass pre-echo, "changement de basse avant le cut") and cut5
(Plosive→Jeudi Drill, the Bogdan stabs on d9/orbit-09, ~-48dB) — plus 5 new
candidates. Auto-populates master_edl_take89.json: 16 edits = 9 ear + 7 derived.

Mapping nailed down (was wrong first pass): stemmap orbit-NN == dN; Tidal's
`# orbit X` is SuperDirt-0-indexed → d(X+1) (so `# orbit 8` == d9). d8 = always
breaks. Honest coverage cap logged: a foreign SOUND on a shared+active orbit is
invisible at orbit level → v2 = spectral/per-sound novelty.