docs: 补充数据目录导读

cai

2026-06-03 6b5e6b29251c46d98c8dc57fe2588492dfba87be

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artifact,path,artifact_role,row_count,sha256
synthetic_timeseries_input.csv,exp-data/raw/RUN-20260601-TIMESERIES-SMOKE-001/synthetic_timeseries_input.csv,raw_input,20,6dd6f17cf5c8d5f370929b408ea485b70fc57364cc63e967f3e90a5756f6783e