getApplicationName abstract method

Returns the name of this application.

The application name is typically derived from:

• Explicit configuration via application.name property
• Main application class name
• Framework default naming
• Deployment environment configuration

Usage:

final appName = context.getApplicationName();

// Use in logging
logger.info('Application $appName starting up');

// Use in monitoring
metrics.gauge('app.name', appName);

// Use in UI or API responses
return {
  'app': appName,
  'version': '1.0.0',
  'status': 'running'
};