feat: add comprehensive marketplace scenario testing and update production readiness workflow

🛒 Marketplace Testing Enhancement:
• Add complete marketplace workflow test with 6-step scenario
• Test GPU bidding from aitbc server to marketplace
• Test bid confirmation and job creation by aitbc1
• Test Ollama AI task submission and execution monitoring
• Test blockchain payment processing and transaction mining
• Add balance verification for both parties after payment
• Add marketplace status

performance/metrics_20260329_183359.txt

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+Maintenance Performance Metrics
+Generated: So 29 Mär 2026 18:33:59 CEST
+
+System Metrics:
+- CPU Usage: %
+- Memory Usage: %
+- Disk Usage: 47%
+
+Blockchain Metrics:
+- Block Height: 2222
+- Total Accounts: 3
+- Total Transactions: 4
+
+Services Status:
+- aitbc-blockchain-node: active
+- aitbc-blockchain-rpc: active