Are the Actions model files in ext/manual and ext/generated actively used and maintained?

The model files under [actions/ql/lib/ext/manual/](https://github.com/github/codeql/tree/main/actions/ql/lib/ext/manual) and [actions/ql/lib/ext/generated/](https://github.com/github/codeql/tree/main/actions/ql/lib/ext/generated) define threat models for various GitHub Actions. Are these models used by any non-experimental queries? Why haven't these models been updated in ~2 years?

Start by reviewing the model files under actions/ql/lib/ext/manual/ and actions/ql/lib/ext/generated/. Determine whether non-experimental queries use these GitHub Actions models and investigate why they have not been updated in about two years; the work is done when their usage and maintenance status are documented.

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