chore: don't warn for unmocked data: URLs

[serhalp]

I noticed this in test logs:

[WebServer] [test-fixtures] NO FIXTURE PATTERN
[WebServer] ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
[WebServer] URL does not match any known fixture pattern
[WebServer] URL: data:application/octet-stream;base64,AGFzbQEAAAABugM3YAF/AGACf38AYAF/AX9gA39/fwBgAn98AGACf38Bf2ADf39/AX9gBH9/[...snip...]

This isn't an actual network request, so we should ignore it.

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[coderabbitai]

📝 Walkthrough

Walkthrough

The change modifies the global fetch override in the cache module to exclude data: URLs from fixture interception. Previously, data: URLs were eligible to receive fixture-driven responses; with this alteration, such URLs now bypass the fixture system and are fetched through the original network path. The remaining fixture processing logic for other URL types, including esm.sh handling and fallback fixture-based responses, remains unchanged.

🚥 Pre-merge checks | ✅ 1

✅ Passed checks (1 passed)

Check name	Status	Explanation
Description check	✅ Passed	The PR description clearly relates to the changeset by explaining the problem (data: URLs triggering false fixture warnings) and the solution (bypassing fixture interception for data: URLs).

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch chore/dont-warn-for-unmocked-data-urls

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

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