v1.6.1

Fixed

• Fused expert shape derivation no longer treats an even Qwen expert count
  as DeepSeek dual w1+w3 gate concat. Multiplicity is taken from
  per-index membership in the fused member list (DeepSeek gate still uses
  multiplicity 2).
• fused_expert_module skips integrated mtp.* experts, matching
  fused_expert_tensor_target, so the quant predicate does not invent
  mtp.*.switch_mlp.* modules for byte-preserved MTP sidecars.
• HyperConnection / HyperHead learnable .scale paths no longer expand to
  .scales aliases (avoids ambiguous converted-tensor binding).
• Qwen exact MTP benchmark profile fails closed when the profile contract is
  not met (no silent mismatch).

Notes / operators

• Patch over v1.6.0 DeepSeek V4 development convert support. No migration for
  existing non-DeepSeek artifacts.
• DeepSeek convert still needs an mlx-lm build with deepseek_v4; packs
  remain development evidence only.