feat: Add Translated Closed Captions Support & Platform Updates

[sachaarbonel]

Core Feature: Translated Closed Captions

• Introduced CallClosedCaptionTranslated model with multilingual text support via i18n_text
• Added real-time translation events through ClosedCaptionTranslatedEvent
• Integrated translation settings into call transcription configuration:
  • Enable/disable translations per call
  • Specify target languages
• Added translating status flag to call state tracking
• Extended caption metadata with language IDs and session tracking

Key Enhancements

1. New Moderation Features

   • Added shadow_block moderation action
   • Introduced message visibility restrictions with send-restricted-visibility-message capability
   • Enhanced moderation analytics with action distributions

2. User Management

   • Added guest_user_creation_disabled flag for app settings
   • Extended user analytics with banned-until timestamps and flagged content counts

3. Async Export System

   • Added new async export event models for channels/users (AsyncExportChannelsEvent, AsyncExportUsersEvent)
   • Removed legacy get_export_channels_status endpoint and related models

4. Video Call Improvements

   • Added FPS statistics tracking for sessions
   • Extended call recordings with session IDs
   • Removed deprecated RTMP broadcast parameters from API

Breaking Changes

• Removed start_rtmp_broadcasts parameter from video call APIs
• Removed deprecated ExportChannelsResult and GetExportChannelsStatusResponse models