The larger demo estate overflowed the rollups mock test's single
500-row page and pushed internal/api past the 25m -race budget, and
the alert history tests raced TempDir cleanup by never joining the
periodic save worker.
Walk every rollups page in the integration test, raise the shard
budget to 50m, and stop history managers through Stop() so the save
worker is joined before cleanup.
Contract-Neutral: test-only CI fix: paginate rollups mock test, join history save worker in test teardown, raise shard go test timeout for the 50-node demo estate; no runtime or contract delta
rcourtman
814f700883