DrRataplan / xq-lsp / 26340748780

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fix: eliminate XQST0081 false positives from QT4 environment namespaces

The QT4 test runner was ignoring <environment ref="..."/> elements on test
cases. Those environments define namespace bindings (e.g. bin:, file:, err:)
that the XQuery processor would pre-declare but the query text doesn't contain.
Our findUndeclaredPrefixUsages diagnostic correctly flagged them, producing
728 spurious XQST0081 false positives in the snapshot suite.

Fix the runner to parse <environment name="..."> definitions from each
test-set file and the catalog, then inject their <namespace> bindings into
the analysis before running diagnostics. Also add the xml: prefix (always
predefined in XML/XQuery) to BUILTIN_PREFIXES.

Result: XQST0081 false positives 728 → 2 (the 2 remaining are xsi:nil in
schema-aware XQuery Update tests, a deliberate out-of-scope edge case).

https://claude.ai/code/session_01HN56Uoa5i1wisXsaaJxtLq

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