Add StatusCodeMap.ToQualityCategoryByte(uint) so the StatusCode → quality-byte
mapping lives in one place next to its inverse (FromQualityByte). GalaxyDriver
OnPumpDataChange now delegates to the helper instead of duplicating the shift+switch
inline; a future edit to the OPC UA bit layout cannot silently desync the probe-health
decode. Unit tests in StatusCodeMapTests pin all three category buckets and the
round-trip invariant.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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