Update Release 606.0.0

[Kriys94]

Release @metamask/core-backend@1.0.0

This PR releases the initial version of the @metamask/core-backend package.

📦 Package Overview

@metamask/core-backend provides core backend services for MetaMask, serving as the data layer between Backend services (REST APIs, WebSocket services) and Frontend applications (Extension, Mobile). This package enables authenticated real-time data delivery with type-safe controller integration.

✨ What's New in v1.0.0

This is the initial release of the package, introducing:

Core Services

• BackendWebSocketService - WebSocket client providing authenticated real-time data delivery with:

  • Connection management and automatic reconnection with exponential backoff
  • Message routing and subscription management
  • Authentication integration with AuthenticationController
  • Type-safe messenger-based API for controller integration

• AccountActivityService - High-level service for monitoring account activity with:

  • Real-time account activity monitoring via WebSocket subscriptions
  • Balance update notifications for integration with TokenBalancesController
  • Chain status change notifications for dynamic polling coordination
  • Account subscription management with automatic cleanup

Infrastructure

• Type definitions - Comprehensive TypeScript types for transactions, balances, WebSocket messages, and service configurations
• Logging infrastructure - Structured logging with module-specific loggers for debugging and monitoring

📄 Changelog

See CHANGELOG.md for full details.

🔗 Related PR

• Initial implementation: feat(core-backend): add package #6722

✅ Release Checklist

• Version bump is correct (1.0.0 for initial release)
• Changelog entries are accurate and comprehensive
• All changes are properly documented
• Package is ready for publication
• No additional changes from main need to be incorporated

📚 Documentation

• Package README
• Architecture documentation

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