fix: resolve all compilation issues across transport and lifecycle packages

- Fixed duplicate type declarations in transport package
- Removed unused variables in lifecycle and dependency injection
- Fixed big.Int arithmetic operations in uniswap contracts
- Added missing methods to MetricsCollector (IncrementCounter, RecordLatency, etc.)
- Fixed jitter calculation in TCP transport retry logic
- Updated ComponentHealth field access to use transport type
- Ensured all core packages build successfully

All major compilation errors resolved:
✅ Transport package builds clean
✅ Lifecycle package builds clean
✅ Main MEV bot application builds clean
✅ Fixed method signature mismatches
✅ Resolved type conflicts and duplications

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

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

tests/integration/arbitrage_test.go

@@ -43,7 +43,7 @@ func TestMain(m *testing.M) {
 	os.Exit(code)
 }
 
-func setupTestEnvironment(t *testing.T) (*arbitrage.SimpleArbitrageService, func()) {
+func setupTestEnvironment(t *testing.T) (*arbitrage.ArbitrageService, func()) {
 	// Create test logger
 	log := logger.New("debug", "text", "")
 
@@ -86,7 +86,7 @@ func setupTestEnvironment(t *testing.T) (*arbitrage.SimpleArbitrageService, func
 	require.NoError(t, err, "Failed to create test database")
 
 	// Create arbitrage service
-	service, err := arbitrage.NewSimpleArbitrageService(
+	service, err := arbitrage.NewArbitrageService(
 		client,
 		log,
 		cfg,