docs: add Hercules CI badge

[UnstoppableMango]

Adds a Hercules CI status badge to the README, linking to the project on hercules-ci.com.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Documentation
  • Added a Hercules CI status badge beneath the README title.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: 5759cf44-f7aa-4c01-9ca8-4734e654b426

📥 Commits

Reviewing files that changed from the base of the PR and between 81e9f0e and a21809d.

📒 Files selected for processing (1)

• README.md

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📝 Walkthrough

Walkthrough

The README adds a Hercules CI status badge beneath its title. The badge links to the project’s Hercules CI page.

Changes

README badge

Layer / File(s)	Summary
Add Hercules CI badge README.md	The README displays a Hercules CI badge linked to the project’s Hercules CI page.

Priority: ⬇️ Low

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

Change: Other

Merge Risk: ⚪ Minimal · up to a2180

The README badge points to the matching Hercules CI project; no actionable merge risk remains.

🚥 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 and concisely describes the README change: adding a Hercules CI badge.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
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 💡 1

🧪 Generate unit tests (beta)

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🛠️ Fix failing CI checks 💡

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