Z-Screen pilot v2.0.0

Update data and model-weight licensing to CC BY-NC 4.0

v1.5.1: update cluster pathway annotations and summary counts

v1.5.0 (2026-08-31): annex_clusters census, ensemble rescoring panel, fold-0 baselines, docs/summary, LIMITS.md renamed HOW_TO_READ.md (part 2)

v1.4.2: phenomimicry calibration on 1,000-draw + hub-matched nulls; guardrail-rebuilt top-100; control coverage widened to all 35 named controls

v1.4.0: drop single-compound split-half row from the signal-strength table

v1.4.0: retire INTERPRETATION_LIMITS (guidance folded into SCIENTIFIC_OVERVIEW and annex LIMITS docs)

v1.4.0: references updated after retiring INTERPRETATION_LIMITS

v1.4.0: add annex_phenomimicry (43-set CRISPR-KO concordance, empirical-null calibrated); slim ledger to 1,027 rows; update docs

v1.3.0: add annex_controls — measured mRNA profiles of the 35 control compounds (5 contexts, 256k wells)

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