At component instantiation time (e.g. db, wal, table), existing metrics are
provided to the components with the correct variable label set. This moves the
metric registration lifecycle to the store level and avoids duplicate
registration panics when e.g. reopening a closed db.
At component instantiation time (e.g. db, wal, table), existing metrics are provided to the components with the correct variable label set. This moves the metric registration lifecycle to the store level and avoids duplicate registration panics when e.g. reopening a closed db.