Async event queue manager fixes

[martinzima]

• external events and events published by non-event sourced aggregates are not stored to DB if not dispatched to any async event queues (no need to store them then)
• manually published events no longer require explicitly set event message ID
• breaking change: BasicEventMetadataNames moved to Revo.Core.EventsBasic
• improved test coverage

[codecov[bot]]

Codecov Report

Merging #23 (647344a) into develop (636cce5) will increase coverage by 1.75%. The diff coverage is 86.88%.

:exclamation: Current head 647344a differs from pull request most recent head ba3d838. Consider uploading reports for the commit ba3d838 to get more accurate results

@@             Coverage Diff             @@
##           develop      #23      +/-   ##
===========================================
+ Coverage    35.09%   36.85%   +1.75%     
===========================================
  Files          466      469       +3     
  Lines         6861     6927      +66     
===========================================
+ Hits          2408     2553     +145     
+ Misses        4453     4374      -79     

Impacted Files	Coverage Δ
...rs/EF6/Revo.EF6/EventStores/EF6EventStoreModule.cs	0.00% <ø> (ø)
Providers/EF6/Revo.EF6/Events/EF6EventsModule.cs	0.00% <0.00%> (ø)
...s/EFCore/Revo.EFCore/EFCoreInfrastructureModule.cs	0.00% <ø> (ø)
...Revo.EFCore/Events/EFCoreAsyncEventQueueManager.cs	0.00% <0.00%> (ø)
...rs/EFCore/Revo.EFCore/Events/EFCoreEventsModule.cs	0.00% <0.00%> (ø)
...FCore/Repositories/EFCoreCoordinatedTransaction.cs	0.00% <ø> (ø)
Revo.Core/Events/BasicEventMetadataNames.cs	100.00% <ø> (ø)
Revo.Core/Types/VersionedTypeId.cs	100.00% <ø> (ø)
...frastructure/EventStores/EventStoreEventMessage.cs	100.00% <ø> (ø)
...o.Infrastructure/EventStores/Generic/EventStore.cs	56.86% <ø> (ø)
... and 25 more

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