Initial commit: CODEX_ADK (Svrnty Console) MVP v1.0.0

This is the initial commit for the CODEX_ADK project, a full-stack AI agent
management platform featuring:

BACKEND (ASP.NET Core 8.0):
- CQRS architecture with 6 commands and 7 queries
- 16 API endpoints (all working and tested)
- PostgreSQL database with 5 entities
- AES-256 encryption for API keys
- FluentValidation on all commands
- Rate limiting and CORS configured
- OpenAPI/Swagger documentation
- Docker Compose setup (PostgreSQL + Ollama)

FRONTEND (Flutter 3.x):
- Dark theme with Svrnty branding
- Collapsible sidebar navigation
- CQRS API client with Result<T> error handling
- Type-safe endpoints from OpenAPI schema
- Multi-platform support (Web, iOS, Android, macOS, Linux, Windows)

DOCUMENTATION:
- Comprehensive API reference
- Architecture documentation
- Development guidelines for Claude Code
- API integration guides
- context-claude.md project overview

Status: Backend ready (Grade A-), Frontend integration pending

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

FRONTEND/lib/api/endpoints/health_endpoint.dart

@@ -0,0 +1,59 @@
+/// Health check endpoint for API connectivity testing
+library;
+
+import '../client.dart';
+import '../types.dart';
+
+// =============================================================================
+// Health Endpoint
+// =============================================================================
+
+/// Extension on CqrsApiClient for health check operations
+extension HealthEndpoint on CqrsApiClient {
+  /// Check if the API is healthy and responding
+  ///
+  /// Returns a `Result<bool>` where:
+  /// - Success: true if API is healthy
+  /// - Error: ApiError with details about the failure
+  ///
+  /// Example:
+  /// ```dart
+  /// final client = CqrsApiClient(config: ApiClientConfig.development);
+  /// final result = await client.checkHealth();
+  ///
+  /// result.when(
+  ///   success: (isHealthy) => print('API is healthy: $isHealthy'),
+  ///   error: (error) => print('Health check failed: ${error.message}'),
+  /// );
+  /// ```
+  Future<Result<bool>> checkHealth() async {
+    return executeQuery<bool>(
+      endpoint: 'health',
+      query: const HealthQuery(),
+      fromJson: (json) => json as bool,
+    );
+  }
+}
+
+/// Standalone health check function for convenience
+///
+/// Creates a temporary client instance to perform the health check.
+/// Use this when you don't have a client instance readily available.
+///
+/// Example:
+/// ```dart
+/// final result = await performHealthCheck();
+/// if (result.isSuccess && result.value) {
+///   print('API is ready!');
+/// }
+/// ```
+Future<Result<bool>> performHealthCheck({
+  ApiClientConfig config = ApiClientConfig.development,
+}) async {
+  final client = CqrsApiClient(config: config);
+  try {
+    return await client.checkHealth();
+  } finally {
+    client.dispose();
+  }
+}