v0.9.3

• Added distributed-tracing instrumentation via the vendor-neutral
  ph-telemetry facade. kaltblut-core and
  kaltblut-verapdf emit spans around the usual hotspots (source read, PDFBox parse, XMP parse,
  attachment extraction, BR-HYBRID + PDF/A-3 validation) and degrade to no-ops when no tracer is
  registered — no OpenTelemetry dependency is added to the library. The kaltblut-cli module ships
  an opt-in OpenTelemetry binding (-Dotel.enabled=true / OTEL_ENABLED=true). See
  Telemetry.

Full Changelog: kaltblut-parent-pom-0.9.2...kaltblut-parent-pom-0.9.3