v1.4

Fixes

• Schema- and pattern-level <let>s are now honoured. Previously only rule-level <let>s were read, so any test using a variable declared higher up failed to evaluate and was silently skipped, so a document could pass with exit code 0. (They are evaluated in the rule's context, not the document root.)
• Line / xml:id resolution in -v now works for no-namespace and undeclared-namespace elements, and for offenders that are attributes or text nodes (previously l.?).

Changes

• XPath evaluation errors are reported once per rule with a node count, and the summary flags the verdict as INCOMPLETO. The exit code is unchanged.
• Let/current() wrapping is precomputed when the schema loads.
• Refactor: shared cache_al_dia and href_xml_model helpers; validate-all.sh now reuses href_xml_model instead of its own xml-model parsing.