Fix/pnp require cache extensions 7234

[Ayush442842q]

What's the problem this PR addresses?

Under Yarn PnP on Node.js versions affected by HAS_BROKEN_FSTAT_FOR_ZIP_FDS (such as Node.js v22.22.3+, v24.15.0, v25.7.0+), require.cache and require.extensions are undefined in CommonJS dependencies (such as rechoir, webpack-cli, tailwindcss, eslint).

Root Cause

1. In affected Node.js versions, a regression in Node's ESM loader caused fstatSync on virtual file descriptors for files inside .zip archives to throw EBADF: bad file descriptor, fstat.
2. To work around this in Yarn PnP, HAS_BROKEN_FSTAT_FOR_ZIP_FDS was added to return { format: 'commonjs', source: <file_content> } from the ESM load hook for CJS files in zip archives.
3. Returning source for format: 'commonjs' forces Node's ESM loader to construct a synthetic CommonJS module wrapper instead of using standard CJS module loading (Module._load).
4. Node's synthetic require function passed to CJS modules loaded via the ESM loader does not attach require.cache or require.extensions (undefined). Any dependency inside a zip archive accessing require.cache or require.extensions fails with a TypeError.

Closes #7234.

How did you fix it?

1. Patched Module.prototype._compile: In packages/yarnpkg-pnp/sources/loader/applyPatch.ts, monkey-patched Module.prototype._compile to inject a single-line safeguard statement at the top of CommonJS module contents:

   if (typeof require !== 'undefined') { if (!require.cache) require.cache = Module._cache; if (!require.extensions) require.extensions = Module._extensions; };

2. Shebang Compatibility: If the source file starts with a shebang (#!), the safeguard statement is inserted immediately after the shebang line to preserve shebang parsing.

3. Line Numbering Preservation: Because the safeguard is a single statement on a single line, line numbers in stack traces and sourcemaps remain unaffected.
   Rebuilt Hook Artifacts: Recompiled PnP hook bundles (sources/hook.js, sources/hook.raw.js, sources/esm-loader/built-loader.js).

4. Added Acceptance Test: Added an acceptance test in packages/acceptance-tests/pkg-tests-specs/sources/require.test.js verifying that require.cache and require.extensions are available inside required dependencies under PnP.

Checklist

• I have read the Contributing Guide.
• I have set the packages that need to be released for my changes to be effective.
• I will check that all automated PR checks pass before the PR gets reviewed.