fix(readme): repair the broken star history chart

[OctoBored]

The Star History chart in the README is currently broken because the upstream star-history.com image endpoint no longer works for this repository, a consequence of GitHub's stargazer API restrictions. This change points the chart at the star-history.dera.page service, which serves the SVG chart directly and renders correctly, so the chart displays as intended again.

Summary by CodeRabbit

• Documentation
  • Updated Star History embeds to use the new star-history.dera.page URLs.

[CLAassistant]

All committers have signed the CLA.

[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: 17833861-c898-428a-b300-18f5a7df3ac7

📥 Commits

Reviewing files that changed from the base of the PR and between 0f41769 and 53999f9.

📒 Files selected for processing (1)

• README.md

Included review availability: Your plan provides up to 4 included reviews per hour; 3 remain after this review.

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📝 Walkthrough

Walkthrough

The README Star History embed now uses star-history.dera.page URLs for its link and chart images. Dark and light theme variants remain unchanged.

Changes

Star History URL update

Layer / File(s)	Summary
Update Star History embed README.md	The Star History link and chart image sources now use star-history.dera.page URLs. Theme variants and chart metadata remain preserved.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to 53999

This is a localized documentation-only change that restores the Star History chart display without changing product behavior; no actionable merge-blocking risk remains.

Suggested reviewers: physicalsuperintelligence

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description explains the change and motivation but omits the required Testing done and Checklist sections.	Add the required Testing done and Checklist sections, and state which checks were run and whether each checklist item is complete.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly describes the README fix for the broken Star History chart.
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 unit tests (beta)

• Create PR with unit tests

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