huge refactor to remove depenencie hell and add typesafe container

libs/core/handlers/src/index.ts

@@ -2,8 +2,7 @@
 export { BaseHandler, ScheduledHandler } from './base/BaseHandler';
 export type { JobScheduleOptions } from './base/BaseHandler';
 
-// Handler registry
-export { handlerRegistry } from './registry/handler-registry';
+// Handler registry is now in a separate package
 
 // Utilities
 export { createJobHandler } from './utils/create-job-handler';