fix: respect RSPACK_BINDING in loader workers

[hardfist]

Summary

• apply the custom binding rewrite to both dist/index.js and dist/worker.js
• ensure the main compiler and parallel-loader workers load the same binding when RSPACK_BINDING is set
• fix the post-build hook, which previously processed only the main entry bundle
• checked with the @rspack/core build, generated bundle assertions, Prettier, and Rslint

Related links

• Fixes [Bug]: RSPACK_BINDING is ignored by parallel-loader workers #14771

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[github-actions]

📦 Binary Size-limit

Comparing 7715a2b to fix(fs): include paths in native filesystem errors (#14760) by hardfist

🙈 Size remains the same at 66.51MB

[codspeed-hq]

Merging this PR will not alter performance

✅ 43 untouched benchmarks
⏩ 47 skipped benchmarks¹

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_{Comparing codex/fix-parallel-loader-binding (7715a2b) with main (cfa680e)}

Footnotes

1. 47 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[Copilot]

Pull request overview

This PR fixes a packaging/runtime mismatch in @rspack/core where Tinypool loader-worker processes could ignore RSPACK_BINDING, causing the main compiler and worker threads to load different native bindings in the same Node process.

Changes:

• Extend the post-build codemod rewrite to apply to both dist/index.js and dist/worker.js.
• Ensure the loader-worker bundle uses the same process.env.RSPACK_BINDING override logic as the main entry output.

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[chatgpt-codex-connector]

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