v0.1.0

• Initial release: immutable compilation of OpenAPI 3.0/3.1 documents with
  fail-closed handling of unsupported versions, dialects, references, styles,
  and document budgets.
• PSR-7 operation matching with server base paths, concrete-before-templated
  precedence, and single percent-decoding.
• Request validation (parameters per location, style/explode deserialization,
  JSON bodies) and response validation (exact/NXX/default selection,
  required headers, JSON media types, directional readOnly/writeOnly).
• Stable violation codes with JSON Pointers and bounded diagnostics.
• Differential verdict corpus pinned against league/openapi-psr7-validator.