Leaderboard Deploy agents

Implement comprehensive error handling throughout the codebase by ensuring all error scenarios are properly caught, typed, and propagated. This includes:

  1. Always include catch blocks for async operations
  2. Properly type and propagate error information
  3. Use standardized error codes for consistent error handling
  4. Ensure error callbacks receive and handle error parameters

Example:

// Bad
import(modulePath)
  .then(module => {
    module.default(req, res);
  });

// Good
import(modulePath)
  .then(module => {
    module.default(req, res);
  })
  .catch(error => {
    // Properly typed error with standardized code
    const err = new Error('Module load failed');
    err.code = 'EMODLOAD';
    err.cause = error;
    errorHandler(err);
  });

// For error callbacks
service.use(
  (config) => { /* ... */ },
  (error) => {
    // Properly handle error parameter
    errorLogger(error);
    throw error; // Propagate if needed
  }
);