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>

test/arbitrage_fork_test.go

@@ -284,7 +284,7 @@ func TestArbitrageServiceWithFork(t *testing.T) {
 		defer db.Close()
 
 		// Create arbitrage service
-		service, err := arbitrage.NewSimpleArbitrageService(client, log, cfg, keyManager, db)
+		service, err := arbitrage.NewArbitrageService(client, log, cfg, keyManager, db)
 		require.NoError(t, err)
 		assert.NotNil(t, service)