⚡ Bolt: Optimize Listing Audit scoring engine nested lookups

[projectamazonph]

💡 What

Optimized the gradeListingAudit scoring function in src/engine/listing-audit/engine.ts by transforming the reference findings array into a Map lookup.

🎯 Why

In interactive scenarios, the listing audit grading engine evaluates student findings against the reference findings. Previously, the engine performed Array.prototype.find() searches inside the loop bodies of findingsAccuracy and severityCalibration. This created an $O(N \times M)$ time complexity which can be slow as the number of findings grows.

📊 Impact

• Transforms the algorithmic complexity from $O(N \times M)$ to $O(N + M)$ via $O(1)$ hash map lookups.
• Reduces CPU cycles and improves response times for student submission evaluations.
• Under 50 lines of precise, highly-focused changes with zero micro-optimization noise.

🔬 Measurement

All Vitest tests pass cleanly. Verified through pnpm test and code review.

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PR created automatically by Jules for task 6075910266981458629 started by @projectamazonph

Summary by CodeRabbit

• Performance Improvements
  • Improved listing audit scoring efficiency, especially when processing larger sets of findings.
  • Preserved existing accuracy, severity calibration, and empty-submission behavior.

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No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: d9c5b70c-c65f-4d0a-95ef-df8188e2e97f

📥 Commits

Reviewing files that changed from the base of the PR and between d8e32f4 and af1684d.

📒 Files selected for processing (1)

• src/engine/listing-audit/engine.ts

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📝 Walkthrough

Walkthrough

Changes

Listing Audit Lookup

Layer / File(s)	Summary
Map-based scoring lookups src/engine/listing-audit/engine.ts	gradeListingAudit builds a field-keyed reference map, and both scoring criteria use map lookups instead of repeated array searches while preserving existing scoring behavior.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• projectamazonph/amph-v2#37: Refactors the same listing-audit scoring lookups to use a field-keyed map.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 33.33% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: optimizing nested lookups in the Listing Audit scoring engine.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch perf/bolt-listing-audit-map-6075910266981458629

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