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/comprehensive_arbitrage_test.go

@@ -21,7 +21,7 @@ func TestComprehensiveArbitrageSystem(t *testing.T) {
 	// Test 1: Basic Profit Calculation
 	t.Log("\n--- Test 1: Basic Profit Calculation ---")
 
-	calc := profitcalc.NewSimpleProfitCalculator(log)
+	calc := profitcalc.NewProfitCalculator(log)
 
 	// WETH/USDC pair
 	wethAddr := common.HexToAddress("0x82af49447d8a07e3bd95bd0d56f35241523fbab1")
@@ -230,7 +230,7 @@ func TestOpportunityLifecycle(t *testing.T) {
 	t.Log("=== Opportunity Lifecycle Test ===")
 
 	// Initialize system components
-	calc := profitcalc.NewSimpleProfitCalculator(log)
+	calc := profitcalc.NewProfitCalculator(log)
 	ranker := profitcalc.NewOpportunityRanker(log)
 
 	// Step 1: Discovery