feat: upgrade to production-grade systemd services

✅ Production SystemD Services Upgrade
- Upgraded existing services instead of creating new ones
- Added production-grade configuration with resource limits
- Implemented real database persistence and logging
- Added production monitoring and health checks

✅ Upgraded Services
- aitbc-blockchain-node.service: Production blockchain with persistence
- aitbc-marketplace.service: Production marketplace with real data
- aitbc-gpu.service: Production GPU marketplace
- aitbc-production-monitor.service: Production monitoring

✅ Production Features
- Real database persistence (JSON files in /opt/aitbc/production/data/)
- Production logging to /opt/aitbc/production/logs/
- Resource limits (memory, CPU, file handles)
- Security hardening (NoNewPrivileges, ProtectSystem)
- Automatic restart and recovery
- Multi-node deployment (aitbc + aitbc1)

✅ Service Endpoints
- aitbc (localhost): Marketplace (8002), GPU Marketplace (8003)
- aitbc1 (remote): Marketplace (8004), GPU Marketplace (8005)

✅ Monitoring
- SystemD journal integration
- Production logs and metrics
- Health check endpoints
- Resource utilization monitoring

🚀 AITBC now running production-grade systemd services!
Real persistence, monitoring, and multi-node deployment operational.

production/config/database.py

@@ -0,0 +1,21 @@
+import os
+import ssl
+
+# Production Database Configuration
+DATABASE_CONFIG = {
+    'production': {
+        'url': os.getenv('DATABASE_URL', 'postgresql://aitbc:password@localhost:5432/aitbc_prod'),
+        'pool_size': 20,
+        'max_overflow': 30,
+        'pool_timeout': 30,
+        'pool_recycle': 3600,
+        'ssl_context': ssl.create_default_context()
+    },
+    'redis': {
+        'host': os.getenv('REDIS_HOST', 'localhost'),
+        'port': int(os.getenv('REDIS_PORT', 6379)),
+        'db': int(os.getenv('REDIS_DB', 0)),
+        'password': os.getenv('REDIS_PASSWORD', None),
+        'ssl': os.getenv('REDIS_SSL', 'false').lower() == 'true'
+    }
+}