Update release documentation and model entry points

Clarify SFT and RLHF workflows, fix UTR preset, and consolidate shared regression base

Fix Conda user-site isolation and document successful HPCC regression and RLHF checks

Add validated RiNALMo-Giga and Evo 2 benchmarks, revised figures and portable environments

Publish portable RNASeek workflows, fixed analyses, and tested checkpoints