chore: add bare timeseries tag, remove ineffective modality field

chore: fix modality field, drop modality tag, sync language

chore: translate to English, sync source metadata, add format:tsfile tag

chore: translate README to English and add format:tsfile tag

chore: normalize tsfile dataset metadata

Re-encode all 11 TsFiles with type-based encodings + LZ4 (smaller size)

Disable HF viewer and add TsFile data-preview section (viewer: false)

Add TsFile (converted from ruiqil/SpatialEpiBench)

initial commit