quantmodel — Add sortable maximum drawdown to individual and Meta catalogs

Objective

Add sortable maximum drawdown to individual and Meta catalogs.

Notes: Derived maximum drawdown from checked-in monthly returns; added individual sortable and Meta catalog columns, tests, finding, and regenerated scaffold artifacts.

Approach

Reuses existing report research/findings/catalog-max-drawdown-t223.md — tables/metrics preserved verbatim via source_report pointer. Body below summarizes grounded evidence from that report and adjacent artifacts.

Files / code / data changed

No commit SHA confidently associated with t223 in sampled log [reconstructed — uncertain].
Source report: research/findings/catalog-max-drawdown-t223.md
Task-history entry: research/findings/task-history.json#t223

Results

Conclusions and metrics are in research/findings/catalog-max-drawdown-t223.md; see detail page for preserved tables/metrics.

Conclusions

[reconstructed — uncertain] Outcome inferred from status done and task note.

Problems / follow-ups

See source report or PR discussion for follow-ups. No unsupported follow-ups fabricated.