Add MiniMaxH3FlexRef2VAModel / MiniMaxH3FlexFL2VAModel for OmniRefPDDQADMethod: dense attention, Pika's shifted 1000..40 ladder, re-noise steps whose noise is a function of (row seed, forward, modality), NVFP4 linears only. Add an offline fp32 adapter merge script and QAD configs for both adapters. Let model profiles pick their attention backend and receive the prepared row in schedulers().