Publish two searched LTX-2.5 transformer profiles

Replace LTX-2.5 Dev transformers with searched DDB v2 quants

Add Gemma 4 12B LTX 2.5 NVFP4 text encoder

Add files using upload-large-folder tool

docs: expand LTX-2.5 quant model card

Add LTX-2.5 DDB quant recipes and pre-release card

initial commit