quantmodel — Implement comparison calendar-year return table

Objective

Implement comparison calendar-year return table.

Notes: Added pure complete-calendar-year compounding, selection-order responsive rendering, explicit unavailable state, shared lifecycle cleanup, and focused tests.

Approach

Reuses existing report research/findings/comparison-calendar-years-t237.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 t237 in sampled log [reconstructed — uncertain].
Source report: research/findings/comparison-calendar-years-t237.md
Task-history entry: research/findings/task-history.json#t237

Results

Conclusions and metrics are in research/findings/comparison-calendar-years-t237.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.