jitsi-meet-0003: av-moderation pendingAudio/Video/Desktop Array.find()
dedup O(P^2) in large moderated meetings — 249.5x op-count at P=500,
138.5x measured at P=2000. Fix: Map<id, participant> for O(1) dedup.
jitsi-meet-0004: visitors middleware delta Array.findIndex() per update
O(U*V) in large broadcast events — 15x at V=5000 U=1000. Fix: Map-based
apply-delta O(1) per join/leave.
solvespace-0002: VRML export colours_present std::vector + find_if
O(T*C) per triangle — 250x op-count at T=50k C=500. Fix: unordered_map
keyed by ToPackedInt() RGBA uint32.
MOAD-0002/0003/0004/0005: CLEAN for both targets.
All 13 unit tests PASS.
