The OTA self-update path only refreshed image-versions.sh, leaving
reconcile-containers.sh and container-specs.sh frozen at whatever
version was baked into the ISO that originally provisioned the
node. Any fix to those scripts (notably the --create-missing flag
and the DISK_GB detection fix shipped this round) never reached
existing nodes, and on .228 both scripts were outright missing
because the node predated their inclusion in the ISO recipe.
Install all three helper scripts to /opt/archipelago/scripts/ on
every self-update run. Also preserve the legacy copy of
image-versions.sh at /opt/archipelago/image-versions.sh for any
older backend binaries still looking there first.
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