Covers single-lora pass-through, multi-lora combine with ' + ', folder ref un-expansion, folder+brackets excluded from combine, bypassed lora exclusion, and ltx_video model_type propagation. Also tightens the existing bracket-array test from substring match to exact string equality and removes the unused pytest import. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>