Normalize OBJ loader cache keys

[sureshchouksey8]

Summary

• Normalize OBJ loader cache keys by removing cachebust_origin instead of only matching an empty trailing parameter.
• Sort remaining query parameters so duplicate EasyEDA model URLs share one in-flight/global cache entry.
• Add Bun tests for cache-equivalent remote URLs and relative URLs.

Verification

• npm run build
• npx --yes bun test tests/normalize-obj-loader-cache-url.test.ts - 3 tests passed

/claim #93

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Project	Deployment	Actions	Updated (UTC)
3d-viewer	Ready	Preview, Comment	May 14, 2026 11:35am

[sureshchouksey8]

Ready for review. The Vercel check is green, and local verification passed with:

• npm run build
• npx --yes bun test tests/normalize-obj-loader-cache-url.test.ts

The patch keeps the change focused on deduplicating OBJ loader cache keys for cache-equivalent EasyEDA model URLs.