Expose ref_boost fidelity dial for Krea 2 Turbo/Raw Identity Edit

The Krea 2 Identity Edit v1.2 LoRA that Maestro already integrates supports a ref_boost parameter in its native node pack (https://github.com/lbouaraba/comfyui-krea2edit). It controls how strongly the model locks onto the reference image's face/identity — default is 1.0 (neutral), and the author's recommended preset for strong likeness is around 4.0.

Right now, Maestro's Image mode for this model only exposes aspect ratio, steps, guidance, LoRA strength, and post-processing/film grain. There's no way to control ref_boost directly, so identity preservation (especially face likeness on i2i edits) is weaker than what the underlying LoRA is actually capable of.

Could this be added as a slider in the model's settings panel? It would make a big difference for anyone doing identity-preserving edits (restaging a character, changing outfit/background/pose while keeping the same face).

Reference for implementation: https://github.com/lbouaraba/comfyui-krea2edit/blob/main/CHANGELOG.md (ref_boost details) and https://huggingface.co/conradlocke/krea2-identity-edit (model card, mentions ~4.0 as the strong-likeness starting point).

Thanks for the great app!