Add chain_composition + binding status; refresh DB, docs, Fidelity plot

Fix score name typo: RM/RM+ -> RW/RW+ (Random-Walk potential)

Fix doc intro setext heading; reorder node feature columns

Rename pair_fidelity to observation_fidelity; document feature columns

Replace distribution figures with new MuSProt plots

Deploy MuSProt React and FastAPI application