/**
 * View Data Layer Tests - Health Functionality
 *
 * This test file will cover the view data layer for health functionality.
 *
 * The view data layer is responsible for:
 * - DTO → UI model mapping
 * - Formatting, sorting, and grouping
 * - Derived fields and defaults
 * - UI-specific semantics
 *
 * This layer isolates the UI from API churn by providing a stable interface
 * between the API layer and the presentation layer.
 *
 * Test coverage will include:
 * - Health status data transformation and aggregation
 * - System metrics and performance view models
 * - Health check data formatting and validation
 * - Derived health fields (status indicators, alerts, etc.)
 * - Default values and fallbacks for health views
 * - Health-specific formatting (uptime, response times, error rates, etc.)
 * - Data grouping and categorization for health components
 * - Real-time health monitoring data updates
 * - Health alert and notification view models
 */