getProviderLabel was a useCallback inside the UsageStats component, but
RecentRequests (a sibling module-level component) called it too, causing
"getProviderLabel is not defined" at runtime.
Extract a module-level resolveProviderLabel() (registry lookup by
id/alias/display prefix) used by RecentRequests; keep the component-scoped
getProviderLabel (which adds connected-provider nodeName/name lookup) for
the main table render paths.