a7c094d6c1
Add Version property to StreamAssignment and ConsumerAssignment so future-version entries from newer cluster peers are gracefully skipped rather than applied incorrectly. ProcessStreamAssignment and ProcessConsumerAssignment now reject entries with Version > CurrentVersion (1), incrementing SkippedUnsupportedEntries for operator visibility. Add MetaEntryType.Unknown with a no-op ApplyEntry handler so unrecognised RAFT entry types never crash the cluster. Version 0 is treated as current for backward compatibility with pre-versioned assignments.