libxml-rs 0.1.0-alpha.14

Native-Rust forensic reimplementation of libxml2+libxslt with C ABI drop-in replacement. Cross-version oracle matrix (libxml2 2.7.8-2.15.3, libxslt 1.1.26-1.1.45) with semantic epochs correlated to upstream commits; full xmllint/xmlcatalog/xsltproc CLIs; differential-court-verified C API closure (xmlXPath*, xmlTextReader*, xmlTextWriter*, catalogs, serialization, data globals, chvalid). 1127 tests passing.