quantmodel — Implement Meta Walk-Forward: minimum variance

Objective

Implement Meta Walk-Forward: minimum variance.

Notes: Implemented annual long-only minimum-variance Meta objective; authenticated/persisted 643 target months and 14 constituent rows; SQLite comparison corr 0.82163/MAE 0.00671; added tests, offline payload, and Windmill page.

Approach

Reuses existing report research/findings/meta-minimum-variance-t192.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 t192 in sampled log [reconstructed — uncertain].
Source report: research/findings/meta-minimum-variance-t192.md
Task-history entry: research/findings/task-history.json#t192

Results

Conclusions and metrics are in research/findings/meta-minimum-variance-t192.md; see detail page for preserved tables/metrics.

Conclusions

Implemented annual long-only minimum-variance Meta objective; authenticated/persisted 643 target months and 14 constituent rows; SQLite comparison corr 0.82163/MAE 0.00671; added tests, offline payload, and Windmill page.

Problems / follow-ups

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