Windows: worktree warm >1MB test can exceed its 30 s timeout

[janicduplessis]

Problem

On windows-latest, packages/stim-cli/src/__tests__/worktree.test.ts > ignored inventory and warm copying … exceeds 1MB can hit its 30 s timeout and fail the test (windows) job.

Evidence

• PR test: release the Windows launcher fixture before cleanup #1014 CI run 35856699090, attempt 6: the case timed out at 30 s; attempts 1, 3, 4, 5 and 7 of the same commit passed it.
• Large ignored-inventory regression test times out under the default five-second limit #731 previously covered this test and is closed, so the Windows timeout is not tracked elsewhere.

Cause

Unknown. Likely Windows file-copy throughput on the runner for the >1 MB fixture, but not measured.

Fix idea

Measure the case's duration on the Windows runner across several attempts; either shrink the fixture while keeping the >1 MB threshold it asserts, or give this case a Windows-specific budget with the measured headroom. Do not skip it.