the same IdempotencyKey maps to the same source EventId · reconnect rebinds the session, not the owner state
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Dedupe and reconnect
• The same IdempotencyKey is converted to the same source EventId; PlayerQuestSpot checks the already-stored sourceEventId and doesn't re-append the domain event.
• On reconnect, the same PlayerId session actor is bound, and progress is confirmed via GetQuestProgressReq.
No binding, no push
• A notify sent while there's no session binding isn't a success condition — the state is recorded in the event store and restored via lookup after reconnect.