v1.28.3

Fixed

Docksentry's own image now carries an org.opencontainers.image.version label (#39, @LeeNX) — so /status docksentry (and the Web UI detail) shows its version, not just the image hash. The image was simply missing the label; the /status reader (v1.26.1) was fine, there was nothing to read. The Dockerfile now sets it (plus image.title) from a VERSION build-arg the publish workflow fills from the release tag. Effective from this image onward; third-party images that don't set the label still show only the hash (no version to invent).