Reaper silently does nothing when source for total space / source for used space is misconfigured

Reaper silently does nothing when source for total space / source for used space is misconfigured: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). We configure some of our RSEs to compute free space from a non-default source by setting the RSE attributes source for…

The task

We configure some of our RSEs to compute free space from a non-default source by setting the RSE attributes `source_for_total_space` and `source_for_used_space` (instead of the default `storage`). This works fine when the source name actually matches one of the usage entries reported for the RSE.

Part of FineEnvs/MiMo-V2.6-RL-harbor-code.