+act - #15501 - Adding support for a Non-blocking, bounded, MPMC mailbox called 'NonBlockingBoundedMailbox'
!con #15496 Remember entries in cluster sharding

- Move all entry related logic out of the ShardRegion and into a
  new dedicated child `Shard` actor.
- Shard actor persists entry started and passivated messages.
- Non passivated entries get restarted on termination.
- Shard Coordinator restarts shards on other regions upon region failure or handoff
- Ensures shard rebalance restarts shards.
- Shard buffers messages after an EntryStarted is received until state persisted
- Shard buffers messages (still) after a Passivate is received until state persisted
- Shard will retry persisting state until success
- Shard will restart entries automatically (after a backoff) if not passivated and remembering entries
- Added Entry path change to the migration docs
fix typo 'inctance'
Merge remote-tracking branch 'pr/15597'
Merge pull request #15697 from fwbrasil/fix-typo

fix typo 'inctance'
Merge pull request #15503 from akka/wip-15501-add-bounded-nonblocking-mpmc-mailbox-√

+act - #15501 - Adding support for a Non-blocking, bounded, MPMC mailbox...
=per #15671 fix local snapshot store picking up wrong file.

Added spec test to cover fix for bug 15671

Replaced deprecated NamedProcessor with NamedPersistentActor. Cleaned up unused message handling. Typos and misspellings.
Merge pull request #15713 from ktoso/port-fix-local-snapshotstore-recovery-ktoso

=per #15671 fix local snapshot store picking up wrong file (Validation)