Remove lastSeen from metricsEqual in ServerWorkspaceRows: computeFleetAggregates
never reads lastSeen, so comparing it in metricsEqual causes background TanStack
Query refetches (dataUpdatedAt changes) to trigger spurious onMetrics callbacks,
cascading into a Dashboard → ServerWorkspaceRows render loop that hits React's
100-render limit in CI.
Add staleTime: Infinity to the test QueryClient to prevent background refetches
from interfering with test assertions.
173f096e33