Twenty computer types existed and six had a machine on them. Three of the
empty ones were near-duplicates of live types - Shopfloor beside Shopfloor PC,
CMM beside CMM PC, Engineer Workstation beside Engineer - which is the kind of
list that grows because deleting from it by hand is nerve-wracking.
retype-by-role types a PC by WHAT IT CONTROLS. A metrology box has an active
relationship to a measuring_tool asset, so the fact is already recorded and
does not need inferring from a hostname or a tool's name. The imaging scope is
the authoritative source and stays so, but only 17 of roughly 292 PCs have
ever reported one, so it cannot answer for the fleet yet. Relationships can:
49 PCs drive a measuring tool, and 36 of them are currently typed as ordinary
shopfloor machines.
prune-types deletes a type only when nothing is on it AND the live pctype map
does not name it. The second guard is the one worth having: the map is what
the collector assigns from at check-in, so deleting a mapped type would leave
every future check-in logging 'mapped ComputerType not found' instead of
typing the machine.
Both report by default and write only with --apply, and prune prints why it is
keeping each type it keeps rather than only what it removes.
Also fixes `computers stats`, which counted the computer type named
'Shopfloor' - the EMPTY duplicate - rather than 'Shopfloor PC'. It has been
reporting 0 shopfloor PCs for as long as both rows existed, which is the same
duplication these commands clear up.
Scope: product
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