Changelog for 2.20.1

[hal-eisen-MG]

Description

• When a replica gets promoted to main upon failover, it will now use correctly incremented durable timestamp. #2366
• Replica will now take MAIN's uuid only when REPLICA's current sequence number is 0. #2388
• Eliminated deadlock caused by concurrent calls to Stop method on the Scheduler. Eliminated deadlock caused by calling Pause after Stop from different threads. #2398
• Fixed a problem where EdgeType index would assign every element as obsolete which then caused the index to be incorrectly emptied by the GC. Fixed another problem where EdgeTypeProperty index never ran its GC. Now properly prevents edge index creation when properties-on-edges is disabled - the user must explicitly provide --storage-properties-on-edges. Now correctly prevents Edge indices being recovered when properties-on-edges is disabled by causing an assert during recovery. Replication now updates edge indices. #2390
• Replica now correctly reflects database registration success or failure. When replica receives a request for registering replica, it will now return status code NOT_MAIN. If attempting to undo an incomplete registration fails, then the Memgraph instance will be intentionally crashed because the system is in unrecoverable state. Main instance can now deal with stale RPC message GetReplicaUUID without crashing the instance. #2373
• Closing instance no longer crashes due to streams and/or TTL running in the background. #2361

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