- Introduced PluginSyncRequest and PluginSyncResponse types for managing plugin synchronization. - Added validation logic for plugin sync responses, including checks for schema version and expiration. - Implemented functionality to clear sensitive data from plugin sync requests and responses. - Enhanced error handling for HTTP requests related to plugin synchronization. - Updated manifest validation to reject artifact URLs containing credentials or query parameters. - Added tests for plugin synchronization, ensuring proper validation and error handling. - Refactored existing code to support resolved authentication configurations for plugin downloads.