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

apps/blockchain-node/scripts/start_mock_blockchain.sh

@@ -0,0 +1,87 @@
+#!/bin/bash
+# Start mock blockchain nodes for testing
+# This script sets up the required mock servers on ports 8081 and 8082
+
+set -e
+
+echo "🚀 Starting Mock Blockchain Nodes for Testing"
+echo "============================================="
+
+# Colors
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+NC='\033[0m'
+
+print_status() {
+    echo -e "${GREEN}[INFO]${NC} $1"
+}
+
+print_warning() {
+    echo -e "${YELLOW}[WARN]${NC} $1"
+}
+
+# Check if required ports are available
+check_port() {
+    local port=$1
+    if curl -s "http://127.0.0.1:$port/health" >/dev/null 2>&1; then
+        print_warning "Port $port is already in use"
+        return 1
+    fi
+    return 0
+}
+
+# Stop any existing mock servers
+stop_existing_servers() {
+    print_status "Stopping existing mock servers..."
+    pkill -f "mock_blockchain_node.py" 2>/dev/null || true
+    sleep 1
+}
+
+# Start mock servers
+start_mock_servers() {
+    print_status "Starting mock blockchain node on port 8081..."
+    cd "$(dirname "$0")/.."
+    python3 tests/mock_blockchain_node.py 8081 > /tmp/mock_node_8081.log 2>&1 &
+    local pid1=$!
+    
+    print_status "Starting mock blockchain node on port 8082..."
+    python3 tests/mock_blockchain_node.py 8082 > /tmp/mock_node_8082.log 2>&1 &
+    local pid2=$!
+    
+    # Wait for servers to start
+    sleep 2
+    
+    # Verify servers are running
+    if curl -s "http://127.0.0.1:8081/health" >/dev/null 2>&1 && \
+       curl -s "http://127.0.0.1:8082/health" >/dev/null 2>&1; then
+        print_status "✅ Mock blockchain nodes are running!"
+        echo ""
+        echo "Node 1: http://127.0.0.1:8082"
+        echo "Node 2: http://127.0.0.1:8081"
+        echo ""
+        echo "To run tests:"
+        echo "  python -m pytest tests/test_blockchain_nodes.py -v"
+        echo ""
+        echo "To stop servers:"
+        echo "  pkill -f 'mock_blockchain_node.py'"
+        echo ""
+        echo "Log files:"
+        echo "  Node 1: /tmp/mock_node_8082.log"
+        echo "  Node 2: /tmp/mock_node_8081.log"
+    else
+        print_warning "❌ Failed to start mock servers"
+        echo "Check log files:"
+        echo "  Node 1: /tmp/mock_node_8082.log"
+        echo "  Node 2: /tmp/mock_node_8081.log"
+        exit 1
+    fi
+}
+
+# Main execution
+main() {
+    stop_existing_servers
+    start_mock_servers
+}
+
+# Run main function
+main "$@"