* Clean up DistributedCache and add additional checks
* Add IEnumerable overloads to DistributedCacheExtensions
* Update handlers to use new IEnumerable overloads
* Move DistributedCacheExtensions to Core
* Restructure cache refreshers into folders
* Add IDistributedCacheNotificationHandler
* Rewrite DistributedCacheBinder into seperate IDistributedCacheNotificationHandler implementations
* Obsolete DistributedCacheBinder and use new IDistributedCacheHandler implementations
* Clean up ServerMessengerBase
* Ensure cache refreshers only process distinct values
* Add support for publishing multiple notifications and filter on handler type
* Suppress compatibility issues
* Remove DistributedCacheBinder and suppress compatibility issues
* Add ScopedNotificationPublisher<TNotificationHandler>
* Improve notification type lookup/enumeration
* Ensure INotificationAsyncHandler handles multiple notitications sequentially
* Minimize cache instruction JSON
* Chunk notifications by type to keep publish order
* Only serialize required RefreshInstruction properties
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