Fix snapshot memory quantity parsing

[PragalvaXFREZ]

Summary

• parse Kubernetes node memory reported in bytes, Ki, Mi, Gi, or Ti
• preserve the existing GiB output and rounding

Root cause

The publisher assumed every node capacity ended in Ki. After a reboot, Kubernetes canonically serialized the control-plane capacity as 3336Mi, causing jq to exit before publishing.

Validation

• tested the converter against the live mixed-unit node capacities
• tested bytes, Ki, Mi, Gi, and Ti inputs
• validated the embedded shell syntax
• kubeconform: 59 valid, 0 invalid, 0 errors, 4 skipped
• git diff --check