React snapshot-on-settle timer captures empty data when streaming flushes are throttled

A streaming graph viz showed "waiting for data..." after streaming completed even though the underlying state had thousands of nodes. The snapshot was set to a partial dataset (nodes but zero edges), an adapter then pruned every node as an orphan, and the cosmos rendered empty. After the stream actually finished and the full state arrived, an early-return in the snapshot effect prevented the snapshot from updating.