Fix initial snapshot replay #2168
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iskakaushik
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During replay connection is reset, invalidating snapshot name. In replays we want to drop slot from failed run & use newly exported snapshot name. That means slot/snapshot name cannot end up in temporal history
Another challenge is child qrep activities are running on peerflow workers, whereas connection is maintained by session on snapshot worker. So instead of relying on maps in session memory, use catalog to share names between workers