refactor: rename marketplace service from enhanced to standard name

Marketplace Service Renaming - Complete:
✅ SERVICE RENAMED: Changed aitbc-marketplace-enhanced.service to aitbc-marketplace.service
- systemd/aitbc-marketplace-enhanced.service: Renamed to aitbc-marketplace.service
- systemd/aitbc-marketplace-enhanced.service.d: Removed old configuration directory
- setup.sh: Updated all references to use aitbc-marketplace.service
- Documentation: Updated all references to use new service name

✅ RENAMING RATIONALE:
🎯 Simplification: Standard service naming convention
📝 Clarity: Removed 'enhanced' suffix for cleaner naming
🔧 Consistency: Matches other service naming patterns
🎨 Standardization: All services follow aitbc-{name}.service pattern

✅ SETUP SCRIPT UPDATES:
📦 install_services(): Updated services array
🚀 start_services(): Updated systemctl start command
🔄 setup_autostart(): Updated systemctl enable command
📋 Status Check: Updated systemctl is-active check

✅ DOCUMENTATION UPDATES:
📚 documented_AITBC_Enhanced_Services__8010-8016__Implementation.md: Updated service path
📚 beginner/02_project/1_files.md: Updated file reference
📚 beginner/02_project/3_infrastructure.md: Updated service table
📚 beginner/02_project/aitbc.md: Updated systemctl commands

✅ SERVICE CONFIGURATION:
📁 systemd/aitbc-marketplace.service: Main service file (renamed)
📁 systemd/aitbc-marketplace.service.d: Configuration directory
⚙️ 10-central-env.conf: EnvironmentFile configuration
🔧 Port 8014: Marketplace API service on port 8014

✅ CODEBASE REWIRED:
🔧 All systemctl commands: Updated to use new service name
📋 All service arrays: Updated in setup script
📚 All documentation: Updated to reference new name
🎯 All references: Consistent naming throughout codebase

✅ SERVICE FUNCTIONALITY:
🚀 Port 8014: Enhanced marketplace API service
🎯 Agent-First: GPU marketplace for AI compute services
📦 FastAPI: Built with uvicorn FastAPI framework
🔒 Security: Comprehensive systemd security settings
👤 Integration: Integrated with coordinator API

✅ BENEFITS:
✅ Cleaner Naming: Standard service naming convention
✅ Consistency: Matches other service patterns
✅ Simplicity: Removed unnecessary 'enhanced' qualifier
✅ Maintainability: Easier to reference and manage
✅ Documentation: Clear and consistent references

RESULT: Successfully renamed marketplace service to standard naming convention and updated entire codebase to use new name, providing cleaner and more consistent service management.

setup.sh

@@ -165,7 +165,7 @@ install_services() {
         "aitbc-blockchain-node.service"
         "aitbc-blockchain-rpc.service"
         "aitbc-multimodal-gpu.service"
-        "aitbc-marketplace-enhanced.service"
+        "aitbc-marketplace.service"
     )
     
     for service in "${services[@]}"; do
@@ -241,12 +241,12 @@ start_services() {
     log "Starting AITBC services..."
     
     # Try systemd first
-    if systemctl start aitbc-wallet aitbc-coordinator-api aitbc-exchange-api aitbc-blockchain-node aitbc-blockchain-rpc aitbc-multimodal-gpu aitbc-marketplace-enhanced 2>/dev/null; then
+    if systemctl start aitbc-wallet aitbc-coordinator-api aitbc-exchange-api aitbc-blockchain-node aitbc-blockchain-rpc aitbc-multimodal-gpu aitbc-marketplace 2>/dev/null; then
         log "Services started via systemd"
         sleep 5
         
         # Check if services are running
-        if systemctl is-active --quiet aitbc-wallet aitbc-coordinator-api aitbc-exchange-api aitbc-blockchain-node aitbc-blockchain-rpc aitbc-multimodal-gpu aitbc-marketplace-enhanced; then
+        if systemctl is-active --quiet aitbc-wallet aitbc-coordinator-api aitbc-exchange-api aitbc-blockchain-node aitbc-blockchain-rpc aitbc-multimodal-gpu aitbc-marketplace; then
             success "Services started successfully via systemd"
         else
             warning "Some systemd services failed, falling back to manual startup"
@@ -275,7 +275,7 @@ setup_autostart() {
     systemctl enable aitbc-blockchain-node.service
     systemctl enable aitbc-blockchain-rpc.service
     systemctl enable aitbc-multimodal-gpu.service
-    systemctl enable aitbc-marketplace-enhanced.service
+    systemctl enable aitbc-marketplace.service
     
     success "Auto-start configured"
 }