Scoped to gea-shopfloor-partmarker so it reaches marker bays only. The script
checks the DNC\Mark registry itself as well, so a mis-scoped entry exits
quietly on an ordinary PC rather than erroring every five minutes.
The entry records what the share layout has to provide, because the script
resolves its two modules relative to its own location and one of them,
ShopdbBackupClient.psm1, is shared with the NTLARS backup and has changed. It
also records the schedule and the settings a bay needs, since all three are
places where a deployment can look successful and quietly do nothing.
Also counts a failed capture as a missed backup, not just a busy port. Port
contention resolves itself; a controller that will not answer does not, and
the two are worth telling apart in the count that reaches ShopDB.
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