ref(utils): Explicitly use None default when checking metadata #4039
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Fixes #4035
As described in the above issue, starting in Python 3.14 importlib_metadata 8 provides the desired behavior, raising KeyError on a missing key. In preparation for this change, and to remove a DeprecationWarning, we should explicitly default to None when getting metadata.
I encountered an issue while linting, inside importlib.metadata. It appears the type hint for Distribution.metadata shows it returning _meta.PackageMetadata, even though it actually returns _adapter.Message. I don't think that is within the scope of this PR, but I may bring it to their attention.Invalid linting error ignored with comment.