The upstream EPICS Base release this crate ports, as evaluated by
configure/CONFIG_BASE_VERSION’s EPICS_VERSION_NUMBER
(EPICS_VERSION.EPICS_REVISION.EPICS_MODIFICATION.EPICS_PATCH_LEVEL
plus the -DEV development-snapshot suffix). This is the single
source of truth for the EPICS Base version the CA/PVA diagnostic
tools report — the Rust analogue of the C EPICS_VERSION_STRING
macro that pvxs prints from version_information
(pvxs/src/describe.cpp).