chore(set): regenerate setlist + preload for the SOUNDCHECK track

PLN added quand_on_decolle under a new ## SOUNDCHECK heading mid-session. The
gate caught both downstream consequences without being asked:

  setlist vs backlog  FAIL -> the .txt was 14, backlog.md was 15
  preload covers set  FAIL -> 'airports' would have been read from DISK on
                              first play, i.e. crackle, on the soundcheck track

That is the #120 failure mode caught BEFORE the venue instead of at it, and it
is the second time in two days the backlog->setlist->preload pipe has earned
itself. gig-up: GO, 10/10 cold.

preload.scd takes effect at the next SuperDirt boot — NOT applied live, since
scsynth is up and restarting it costs ~15s of silence.

armada/setlist_opal2026.txt

@@ -12,9 +12,14 @@
 # to find which orbits ghost across each transition (#68).
 
 
+# --- SOUNDCHECK ---
+live/midi/nova/ambient/quand_on_decolle.tidal             # Quand on decolle
+
 # --- Ouverture ---
 live/midi/nova/techno/bombe_dj.tidal                      # Ceci n'est pas Une Bombe [124]
 live/midi/nova/dnb/wap.tidal                              # WAP [133]
+
+# --- SUNSET ---
 live/techno/do_it_right.tidal                             # Am i _Doing it Right_ [89]
 
 # --- We call it NuJazz ---
@@ -22,6 +27,8 @@ live/midi/nova/lounge/take_5_drops.tidal                  # Take five Drops [124
 live/collab/raph/piment_bresilien.tidal                   # Piment Bresilien [124]
 live/midi/nova/lounge/ouais_je_funk.tidal                 # Eh ouais je Funk [120]
 live/midi/nova/remix/perfect.tidal                        # Perfect <3 [128]
+
+# --- NUIT ---
 live/midi/nova/acid/gimme_acid.tidal                      # Gimme Acid [160]
 live/techno/vague_de_crime.tidal                          # Vague de CRIME [120]
 live/midi/nova/dnb/liquid/you_my_sunshine.tidal           # Sunshine [166]