`unused-ignore` not reported by LSP

[jorenham]

Describe the Bug

With unused-ignore = "error" in the pyrefly config and pyrefly check reports an unused ignore, it doesn't show up in the Pyrefly VSCode extension. I looked at the code a bit and it seems to be an issue with the LSP, rather than the VSCode extension.
As far as I can tell, the issue is that the the detection of unused ignore errors happens in a separate pass, but the LSP doesn't perform that pass.

Sandbox Link

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(Only applicable for extension issues) IDE Information

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