fix: use total seconds for registry history

[lukekarrys]

Registry history previously selected normalized values such as 60.14 ms/package and displayed them as seconds. It now reads total seconds from registryChartData, matching the existing axis and tooltip labels, and falls back to legacy registry totals in chartData. Dates with only normalized registry data are omitted safely.

The history extraction is isolated for regression tests covering current and legacy payloads, source precedence, missing data, and fixture averaging. The inherited pull-request workflow runs the data tests and app build.

Validation: all 29 combined script/app tests pass, including registry source selection with median and partial-failure metadata. A forced TypeScript build, production app build, and targeted ESLint pass.

Depends on #170 (which depends on #172); all history extraction conflicts are resolved. Median-only history and partial-sample exclusions from the parent PRs are preserved.

Closes #154

[coderabbitai]

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📥 Commits

Reviewing files that changed from the base of the PR and between 2a654d4 and 1bcff17.

📒 Files selected for processing (24)

• .github/workflows/benchmark.yaml
• .github/workflows/test.yml
• README.md
• app/package.json
• app/src/components/history-chart.tsx
• app/src/components/ui/chart.tsx
• app/src/components/variation/chart.tsx
• app/src/components/variation/index.tsx
• app/src/components/variation/table.tsx
• app/src/hooks/use-history-data.ts
• app/src/lib/history-data.ts
• app/src/lib/run-completeness.ts
• app/src/lib/utils.ts
• app/src/types/chart-data.ts
• app/tests/partial-results.test.js
• app/tests/statistics.test.ts
• scripts/benchmark-data.test.js
• scripts/benchmark-statistics.js
• scripts/benchmark-statistics.test.js
• scripts/clean-benchmarks.js
• scripts/generate-chart.js
• scripts/history-data.test.js
• scripts/partial-results.test.js
• scripts/process-results.sh

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