fix(refactor): remove deprecated Port80Handler and related utilities

- Deleted event-utils.ts which contained deprecated Port80Handler and its subscribers.
- Updated index.ts to remove the export of event-utils.
- Refactored ConnectionManager to extend LifecycleComponent for better resource management.
- Added BinaryHeap implementation for efficient priority queue operations.
- Introduced EnhancedConnectionPool for managing pooled connections with lifecycle management.
- Implemented LifecycleComponent to manage timers and event listeners automatically.
- Added comprehensive tests for BinaryHeap and LifecycleComponent to ensure functionality.

readme.plan.md

@@ -186,7 +186,7 @@ Phase 2.2 (Connection Pool) ─────────────────
 - **Phase 3** optimizations depend on stable async foundation
 - **Phase 4** monitoring requires all components to be instrumented
 
-## Phase 2: Resource Management (Week 2)
+## Phase 2: Resource Management (Week 2) 🔨 IN PROGRESS
 
 ### 2.1 Timer Lifecycle Management
 
@@ -1178,13 +1178,14 @@ export const PerformanceFlags = {
 - [ ] Performance test to verify event loop improvements
 
 ### Phase 2: Resource Management
-- [ ] Implement LifecycleComponent base class
+- [x] Implement LifecycleComponent base class
 - [ ] Migrate components to extend LifecycleComponent
-- [ ] Implement BinaryHeap data structure
-- [ ] Create EnhancedConnectionPool with queue support
-- [ ] Add connection validation and health checks
+- [x] Implement BinaryHeap data structure
+- [x] Create EnhancedConnectionPool with queue support
+- [x] Add connection validation and health checks  
 - [ ] Implement proper timer cleanup in all components
 - [ ] Add integration tests for resource management
+- [x] Clean up legacy code (removed ts/common/, event-utils.ts, event-system.ts)
 
 ### Phase 3: Performance Optimizations
 - [ ] Implement HashUtils for efficient object hashing