Remove per-candidate pandas Series overhead from exhaustive optimizer

Objective

Remove per-candidate pandas Series overhead from exhaustive optimizer.

Notes: Replaced per-candidate pandas Series metric construction with array-native CAGR/Sharpe/Sortino/drawdown calculations; preserved deterministic selection and sealed holdout; 19 focused tests pass. Hosted latency gate t302 remains open.

Approach

[reconstructed — uncertain] No dedicated findings Markdown located for t313. Summary reconstructed from research/findings/task-history.json entry and git history. Uncertain fields: detailed approach, exact file list, and metrics beyond the task note.

Files / code / data changed

• No commit SHA confidently associated with t313 in sampled log [reconstructed — uncertain].
• Task-history entry: research/findings/task-history.json#t313

Results

Task note: Replaced per-candidate pandas Series metric construction with array-native CAGR/Sharpe/Sortino/drawdown calculations; preserved deterministic selection and sealed holdout; 19 focused tests pass. Hosted latency gate t302 remains open. [reconstructed — uncertain] No quantitative tables recovered for this entry; see git diff and task-history for grounds.

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.

Links

• Task-history: research/findings/task-history.json id t313