XML namespaces are not observed

If the ACT xml file contains a namespace other than the default and an attribute has the same name the compiler generates using the last value. For example,

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Start by reproducing the issue with the ACT XML example containing a non-default namespace and a same-named attribute, then trace the compiler's XML parsing and attribute lookup. Confirm the fix by checking that the generated enum uses the intended attribute value rather than the namespaced value.

Written by the indexing model from the issue text.