obs(grafana): pair stat + timeseries on Pebble internals dashboard#609

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bootjp wants to merge 3 commits intomainfrom

obs/grafana-pebble-stat-timeseries

Commits on Apr 23, 2026

obs(grafana): pair stat + timeseries per Pebble gauge with write-stall thresholds
bootjp
committed

Commits on Apr 24, 2026

fix(grafana): sum memtable bytes across raft groups per node
bootjp
committed
fix(grafana): sum compaction debt + in-progress across groups per node
bootjp
committed