v5.0.0

Added

• Lex streaming support with partial message stitching for bot responses
• transcriptUpdated event for real-time transcript tracking
• onTranscriptUpdated callback in chatSession
• Auto-fetch transcript on connection when transcriptUpdateEnabled is set
• Agent metrics for getConnectionToken and createParticipantConnection errors
• MessageProcessingStatus TypeScript type (PROCESSING, FAILED, REJECTED)
• workflowCanceled content type for handling workflow cancellation events
  @saipreetham16