docs: MoFlow diff vs previous revision (edge fix + residual caps)

Fix edge-index scene mixing; add relative residual cap; guard LED sigma NaN

FIX: restore data/ dataloader modules (lost by over-broad --exclude=data)

Add SETUP.md — end-to-end setup instructions

Add GAMEFORMER_SRA.md (negative result) + standalone GameFormer/C2F/SRA-GameFormer scripts

Add 100-scene NBA sample data for smoke testing + data_dir clarification

SRA: MID/LED/MoFlow code + RUNNING.md instructions (code only, no data/ckpts)

initial commit