perf(cache): double the default fresh window to 24h

[vn7n24fzkq]

Halves steady-state GitHub refresh traffic while peak hours run close to the hourly quota ceiling (#308 follow-up). Viewers sit behind a 48h CDN window, so daily-refreshed data is indistinguishable from the previous 12h. Explicit windows (past years 90d, owner-type 7d) unchanged; stale-test fixtures aged past the new window.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Performance
  • Cached data now remains fresh for up to 24 hours instead of 12, reducing unnecessary refreshes.
  • Stale-cache fallback behavior continues to apply when refreshed data cannot be retrieved.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: e58bb197-7f41-49e8-9cd4-9f91bb7592c9

📥 Commits

Reviewing files that changed from the base of the PR and between ecd8361 and 83541c7.

📒 Files selected for processing (2)

• src/utils/data-cache.ts
• tests/utils/data-cache.test.ts

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📝 Walkthrough

Walkthrough

The default data-cache freshness period increases from 12 hours to 24 hours. Tests for stale refreshes, stale fallbacks, and cache statistics now use timestamps older than 24 hours.

Changes

Cache freshness behavior

Layer / File(s)	Summary
24-hour freshness window src/utils/data-cache.ts, tests/utils/data-cache.test.ts	The default fresh-cache TTL changes to 24 hours, and stale-cache fixtures are updated to exceed the new threshold.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Possibly related PRs

• vn7n24fzkq/github-profile-summary-cards#283: Directly modifies the same cache freshness and stale-behavior semantics.
• vn7n24fzkq/github-profile-summary-cards#293: Also changes freshness-window behavior in src/utils/data-cache.ts.
• vn7n24fzkq/github-profile-summary-cards#297: Modifies the same default freshness window and related stale-cache tests.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the main change: doubling the default cache fresh window to 24 hours.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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/double-fresh-window

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