attacklm-dataset v0.7.0 — memorization-aware epoch capping
Implements MAI-Thinking-1 §2.5.4 NLL<0.01 fraction memorization proxy. New scripts/memorization_report.py. Default behavior: report-only (does NOT auto-apply caps). Caps are a recommendation for review before use. 588 tests pass. 475 baseline + 113 new across v0.5.0-v0.7.0.