Implement and test NAAIM duplicate-date resolution

Objective

Implement and test NAAIM duplicate-date resolution.

Notes: Added immutable NAAIM normalization that rejects unresolved duplicates, requires row-specific rationale/evidence, preserves provenance, and computes base plus extra-day trading-calendar availability; 7 synthetic NAAIM tests and 14 AAII regression tests pass.

Approach

[reconstructed — uncertain] No dedicated findings Markdown located for t334. 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 t334 in sampled log [reconstructed — uncertain].
• Task-history entry: research/findings/task-history.json#t334

Results

Task note: Added immutable NAAIM normalization that rejects unresolved duplicates, requires row-specific rationale/evidence, preserves provenance, and computes base plus extra-day trading-calendar availability; 7 synthetic NAAIM tests and 14 AAII regression tests pass. [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 t334