Grafana Cloud variants of the 14 xrpld dashboards. Identical to the local
grafana/dashboards/ originals except the DS_PROMETHEUS / DS_TEMPO datasource
template variables have their `current` value pinned to the Grafana Cloud
datasource UIDs (grafanacloud-ripplex-prometheus / -traces).
Includes the ledger-data-sync data-type split and node-health mixed-unit
split + Cache Hit Ratio fix merged forward from phases 7 and 9.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
