FourDN Get Experiment Metadata

Get metadata for 4DN experiments including experimental design, biosource information, protocol details, and associated files. Returns experiment type (Hi-C variants, ATAC-seq, ChIP-seq), cell type, processing status, and list of output files. Prerequisites: Requires experiment accession - obtain by using FourDN_search_data with item_type='Experiment'. Use for: understanding experimental context, finding all files from experiment, checking data provenance.