feat: complete data path migration to system location

✅ Complete Data Path Migration
- Updated CLI commands to use /var/lib/aitbc/data
- Updated production config to use /var/lib/aitbc/data
- Updated systemd services to use /var/lib/aitbc/data
- Removed all hardcoded /opt/aitbc/data references
- Removed all hardcoded /opt/aitbc/production/data references

✅ System Compliance
- All data paths now point to /var/lib/aitbc/data
- No repository data paths remaining
- FHS compliant data storage
- Production-ready data architecture

✅ Git Repository Clean
- No dynamic data in repository
- All data paths updated to system location
- .gitignore prevents future tracking
- Clean git history

🚀 AITBC data architecture is now fully compliant with system standards!

production/config/blockchain.py

@@ -17,14 +17,14 @@ BLOCKCHAIN_CONFIG = {
             'port': 8545,
             'rpc_port': 8545,
             'p2p_port': 30303,
-            'data_dir': '/opt/aitbc/production/data/blockchain/aitbc'
+            'data_dir': '/var/lib/aitbc/data/blockchain/aitbc'
         },
         'aitbc1': {
             'host': 'aitbc1',
             'port': 8545,
             'rpc_port': 8545,
             'p2p_port': 30303,
-            'data_dir': '/opt/aitbc/production/data/blockchain/aitbc1'
+            'data_dir': '/var/lib/aitbc/data/blockchain/aitbc1'
         }
     },
     'security': {