Generalize acquisition window to 2025-2026

Remove Annotations section

Restore HF dataset card structure + reconcile with paper §3

Update README to match paper §3 (verbatim from CIKM 2026 submission)

Update metadata schema descriptions in README

Update metadata-en

Update metadata-ja

Update README.md

docs: revert body --- back to em-dash

docs: title separator polish (quoted pretty_name)

docs: replace em dashes with --- in data card body

docs: refresh data card (author edits)

docs: rewrite data card to follow HF official template

docs: restore explicit data_files split mappings in YAML configs

docs: refresh data card with FAIR principles + Datasheet for Datasets (Gebru et al. 2018)

Add evaluation note on query-document overlap in Rev2Rev

Super-squash branch 'main' using huggingface_hub