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>

cmd/mev-bot/main.go

@@ -135,7 +135,7 @@ func startBot() error {
 
 	// Create arbitrage service
 	log.Info("Creating arbitrage service...")
-	arbitrageService, err := arbitrage.NewSimpleArbitrageService(
+	arbitrageService, err := arbitrage.NewArbitrageService(
 		client,
 		log,
 		&cfg.Arbitrage,
@@ -298,7 +298,7 @@ func scanOpportunities() error {
 	scanConfig := cfg.Arbitrage
 	scanConfig.MaxConcurrentExecutions = 0 // Disable execution for scan mode
 
-	arbitrageService, err := arbitrage.NewSimpleArbitrageService(
+	arbitrageService, err := arbitrage.NewArbitrageService(
 		client,
 		log,
 		&scanConfig,