Pure-Java prototype CuasRTDetector + RtParams parameters class +
CuasRTLib JNA stub (activate when JNA added to pom.xml).
No dependencies added; build is clean. See design discussion in
attic/imagej-elphel-internal/handoffs/2026-05-21_RealTimeDesign.md.
Co-authored-by: Claude <claude@elphel.com>