feat: add enrichment audit card

[own-boldsbrain]

Summary

• add EnrichmentAuditCard component with latency histogram, cache/fallback badges, log link and export options
• support latency histogram aggregation helper
• test latency histogram aggregation

Testing

• pnpm lint packages/ui-cards/EnrichmentAuditCard.tsx
• pnpm exec vitest packages/ui-cards/EnrichmentAuditCard.test.ts packages/ui-cards/RiskScoreCard.test.ts (fails: Cannot find package '@/tests/prompts/utils' imported from '/workspace/ai-ysh/lib/ai/models.test.ts')

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https://chatgpt.com/codex/tasks/task_e_68ba522a7a4883328049bf7968b0021f

[Copilot]

Pull Request Overview

This PR introduces a new React component for displaying enrichment audit data with visualization capabilities. The component provides a comprehensive view of data enrichment performance metrics including latency histograms, cache statistics, and export functionality.

Key Changes:

• Added EnrichmentAuditCard component with latency histogram visualization, cache/fallback badges, and export options
• Implemented buildLatencyHistogram helper function for aggregating latency data into bins
• Added comprehensive test coverage for the histogram aggregation logic

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
packages/ui-cards/EnrichmentAuditCard.tsx	New React component with Zod schema validation, histogram visualization, and PNG/JSON export functionality
packages/ui-cards/EnrichmentAuditCard.test.ts	Unit tests for the latency histogram aggregation helper function

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[Copilot]

Memory leak: URL.createObjectURL creates a blob URL that should be revoked after use to free memory. Add URL.revokeObjectURL(url) after link.click().

Suggested change

	const blob = new Blob([json], { type: 'application/json' });
	const url = URL.createObjectURL(blob);
	const link = document.createElement('a');
	link.download = 'enrichment-audit.json';
	link.href = url;
	link.click();
	link.click();
	URL.revokeObjectURL(url);

[Copilot]

[nitpick] The range calculation i * binSize + binSize can be simplified to (i + 1) * binSize for better readability.

Suggested change

	const rangeLabel = `${i * binSize}-${i * binSize + binSize}`;
	const rangeLabel = `${i * binSize}-${(i + 1) * binSize}`;

[Copilot]

When latencies array is empty, Math.max(0, ...latencies) will return 0, but Math.floor(0 / binSize) + 1 will create 1 bin instead of 0 bins. This creates inconsistency with the test expectation that expects [0] for empty input.