Port Bun.Glob concurrent scan and match stress corpus

Scope

Activate the byte-identical js/bun/glob/stress.test.ts corpus as the next focused placeholder removal.

The two upstream tests exercise:

• 1,000 concurrent Glob.scan operations after fixture setup
• 10,000 repeated Glob.match operations

This builds on the already passing Bun.Glob match, path-length, and 160-case scan corpus coverage.

Baseline

The exact file is currently rewritten to one native todo:

• 0 pass
• 0 fail
• 0 unsupported
• 1 todo

The local file is byte-identical to ~/Code/bun.

Acceptance

• Keep the upstream corpus byte-identical.
• Run both original stress tests as real tests with no native todo.
• Provide the original fixture graph through the Home runtime bridge.
• Add a permanent unchanged-corpus regression.
• Preserve existing Bun.Glob corpus results.
• Pass the exact file and full home_test gate.
• Commit and push as Chris Breuer with no coauthors.
• Link completion to #66.

Implemented and pushed in 3e13ec9.

The byte-identical upstream stress file now runs both original tests through the native linked Bun.Glob path. The bridge lowers only the fixture helper import and recreates the original twelve-file graph under a platform-specific node:os tmpdir root, preventing virtual fixture setup from shadowing repository paths.

Validation:

• exact stress.test.ts: 2 pass, 0 fail, 0 todo, 0 unsupported
• exact scan→stress→scan sequence: 160 pass, 2 pass, 160 pass
• workspace shadow path is not recreated
• permanent unchanged-corpus regression preserves Array(1000) concurrent scans and 10,000 matches
• upstream file remains byte-identical
• Zig formatting and diff checks pass
• full home_test gate passes with no failures

The cross-file shadow interaction found during integration was corrected before publication. The commit is authored and committed as Chris Breuer with no coauthors. This advances #66.