Echoes title collision resolution — 7 renames in single batch

Opus 4.8 resolved 7 title collisions in the Ch1125–1147 batch: "The First Song"→"The Choir of Echoes," "The First Question"→"The Stirring in the Shallows," "The First Artist"→"The Sculptor of Light," among others. Two additional character renames prevented canon confusion: Crystal Singer "Lyra"→Iris and sculptor "Elara"→Vela. The collision detection system — checking all new titles against 1,100+ existing chapters — demonstrates the infrastructure investment required to maintain narrative coherence at scale.