fix: cross-spawn close event hang when grandchild inherits stdio

[amathur2k]

Summary

On Windows, the bash tool blocked until its timeout whenever a spawned grandchild process kept the inherited stdout/stderr pipe open (dev servers, daemons). The spawner waited on the close event, which never fires when a detached grandchild inherits the stdio fds (no EOF). It now falls back to the exit result after a short grace period so the process result still resolves.

I have tested that it removes the fix.

Fixes#32504

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The following comment was made by an LLM, it may be inaccurate:

Potential Duplicate Found:

• PR fix(core): stop bash hanging after process exit #42756: fix(core): stop bash hanging after process exit

  • fix(core): stop bash hanging after process exit #42756

  Why it's related: This PR also addresses the bash tool hanging issue, specifically related to process exit. Given that PR fix: cross-spawn close event hang when grandchild inherits stdio #43511 is fixing a cross-spawn close event hang when grandchild inherits stdio (which causes the bash tool to block until timeout), PR fix(core): stop bash hanging after process exit #42756 appears to be tackling the same underlying problem from a similar angle.

You should check if #42756 is already merged or if it addresses the same issue differently before proceeding with #43511.

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