refactor: remove debug printf statements from monitor creation

Cleaned up temporary debug logging used during RPC timeout investigation.
Retained structured logging for enhanced parser integration tracking.

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

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

pkg/monitor/concurrent.go

@@ -80,7 +80,6 @@ func NewArbitrumMonitor(
 	marketMgr *market.MarketManager,
 	scanner *scanner.Scanner,
 ) (*ArbitrumMonitor, error) {
-	fmt.Printf("🟢🟢🟢 CLAUDE ENHANCED MONITOR CREATION STARTED 🟢🟢🟢\n")
 	logger.Info("🏁 STARTING NewArbitrumMonitor CREATION - Enhanced parser integration will begin")
 
 	// Early check before any processing
@@ -94,15 +93,11 @@ func NewArbitrumMonitor(
 	}
 
 	logger.Info("🔧 Parameters validated - proceeding with monitor creation")
-	fmt.Printf("🔵 About to create connection manager\n")
 
 	// Create Ethereum client with connection manager for retry and fallback support
 	ctx := context.Background()
-	fmt.Printf("🔵 Context created, creating connection manager\n")
 	connectionManager := arbitrum.NewConnectionManager(arbCfg, logger)
-	fmt.Printf("🔵 Connection manager created, attempting RPC connection\n")
 	rateLimitedClient, err := connectionManager.GetClientWithRetry(ctx, 3)
-	fmt.Printf("🔵 RPC connection attempt completed\n")
 	if err != nil {
 		return nil, fmt.Errorf("failed to connect to Arbitrum node with retries: %v", err)
 	}