GGUS:1001113 error due to an issue with a new storage machine, rapidly fixed.

Blacklisted on the 15th/16th, once due to a network issue and once for a cvmfs problem.

Downtime around SC 2025, then more cvmfs issues coming out of the downtime, probably because the dense nodes rapidly filled up with Event Index jobs, overloading their cvmfs instances.  We have been planning to switch to accessing cvmfs using the cvmfs-csi Container Storage Interface kubernetes plugin rather than a direct mount, which ought to prevent these issues: this will now happen sooner rather than later.  Unfortunately the image registry was on one of the dense nodes which needed to be rebooted, and failed to clone the images again automatically, so jobs subsequently hung in harvester until the cloning was done by hand.