chore(systemd): remove obsolete systemd service files and update infrastructure documentation

- Remove 8 unused systemd service files from coordinator-api/systemd/
  - aitbc-adaptive-learning.service (port 8005)
  - aitbc-advanced-ai.service
  - aitbc-enterprise-api.service
  - aitbc-gpu-multimodal.service (port 8003)
  - aitbc-marketplace-enhanced.service (port 8006)
  - aitbc-modality-optimization.service (port 8004)
  - aitbc-multimodal.service (port 8002)
  - aitbc-openclaw-enhanced.service (port 8007

contracts/scripts/compile_contracts.sh

@@ -0,0 +1,73 @@
+#!/bin/bash
+
+echo "=== AITBC Smart Contract Compilation ==="
+
+# Check if solc is installed
+if ! command -v solc &> /dev/null; then
+    echo "Error: solc (Solidity compiler) not found"
+    echo "Please install solc: npm install -g solc"
+    exit 1
+fi
+
+# Create artifacts directory
+mkdir -p artifacts
+mkdir -p cache
+
+# Contract files to compile
+contracts=(
+    "contracts/AIPowerRental.sol"
+    "contracts/AITBCPaymentProcessor.sol"
+    "contracts/PerformanceVerifier.sol"
+    "contracts/DisputeResolution.sol"
+    "contracts/EscrowService.sol"
+    "contracts/DynamicPricing.sol"
+    "test/contracts/MockERC20.sol"
+    "test/contracts/MockZKVerifier.sol"
+    "test/contracts/MockGroth16Verifier.sol"
+)
+
+echo "Compiling contracts..."
+
+# Compile each contract
+for contract in "${contracts[@]}"; do
+    if [ -f "$contract" ]; then
+        echo "Compiling $contract..."
+        
+        # Extract contract name from file path
+        contract_name=$(basename "$contract" .sol)
+        
+        # Compile with solc
+        solc --bin --abi --optimize --output-dir artifacts \
+              --base-path . \
+              --include-path node_modules/@openzeppelin/contracts/node_modules/@openzeppelin/contracts \
+              "$contract"
+        
+        if [ $? -eq 0 ]; then
+            echo "✅ $contract_name compiled successfully"
+        else
+            echo "❌ $contract_name compilation failed"
+            exit 1
+        fi
+    else
+        echo "⚠️  Contract file not found: $contract"
+    fi
+done
+
+echo ""
+echo "=== Compilation Summary ==="
+echo "✅ All contracts compiled successfully"
+echo "📁 Artifacts saved to: artifacts/"
+echo "📋 ABI files available for integration"
+
+# List compiled artifacts
+echo ""
+echo "Compiled artifacts:"
+ls -la artifacts/*.bin 2>/dev/null | wc -l | xargs echo "Binary files:"
+ls -la artifacts/*.abi 2>/dev/null | wc -l | xargs echo "ABI files:"
+
+echo ""
+echo "=== Next Steps ==="
+echo "1. Review compilation artifacts"
+echo "2. Run integration tests"
+echo "3. Deploy to testnet"
+echo "4. Perform security audit"