restructure: eliminate box-in-box production architecture

- Move production configs from /opt/aitbc/production/config to /etc/aitbc/production
- Move production services from /opt/aitbc/production/services to /var/lib/aitbc/production
- Centralize production logs in /var/log/aitbc/production
- Remove redundant /opt/aitbc/production directory
- Add production launcher script at /opt/aitbc/scripts/production_launcher.py
- Update production services to use system configuration paths
- Create comprehensive production architecture documentation
- Achieve proper FHS compliance with clean separation of concerns

docs/PRODUCTION_ARCHITECTURE.md

@@ -0,0 +1,76 @@
+# AITBC Production Environment
+
+## 🏗️ Proper System Architecture
+
+The AITBC production environment follows Linux Filesystem Hierarchy Standard (FHS) compliance:
+
+### 📁 System Directory Structure
+
+```
+/etc/aitbc/production/          # Production configurations
+├── .env                       # Production environment variables
+├── blockchain.py              # Blockchain service config
+├── database.py                # Database configuration
+├── services.py                # Services configuration
+└── certs/                     # SSL certificates
+
+/var/lib/aitbc/production/     # Production services and data
+├── blockchain.py              # Production blockchain service
+├── marketplace.py             # Production marketplace service
+├── unified_marketplace.py     # Unified marketplace service
+├── openclaw_ai.py             # OpenClaw AI service
+└── backups/                   # Production backups
+
+/var/log/aitbc/production/      # Production logs
+├── blockchain/                # Blockchain service logs
+├── marketplace/               # Marketplace service logs
+└── unified_marketplace/       # Unified marketplace logs
+```
+
+### 🚀 Launching Production Services
+
+Use the production launcher:
+
+```bash
+# Launch all production services
+/opt/aitbc/scripts/production_launcher.py
+
+# Launch individual service
+python3 /var/lib/aitbc/production/blockchain.py
+```
+
+### ⚙️ Configuration Management
+
+Production configurations are stored in `/etc/aitbc/production/`:
+- Environment variables in `.env`
+- Service-specific configs in Python modules
+- SSL certificates in `certs/`
+
+### 📊 Monitoring and Logs
+
+Production logs are centralized in `/var/log/aitbc/production/`:
+- Each service has its own log directory
+- Logs rotate automatically
+- Real-time monitoring available
+
+### 🔧 Maintenance
+
+- **Backups**: Stored in `/var/lib/aitbc/production/backups/`
+- **Updates**: Update code in `/opt/aitbc/`, restart services
+- **Configuration**: Edit files in `/etc/aitbc/production/`
+
+### 🛡️ Security
+
+- All production files have proper permissions
+- Keystore remains at `/var/lib/aitbc/keystore/`
+- Environment variables are protected
+- SSL certificates secured in `/etc/aitbc/production/certs/`
+
+## 📋 Migration Complete
+
+The "box in box" structure has been eliminated:
+- ✅ Configurations moved to `/etc/aitbc/production/`
+- ✅ Services moved to `/var/lib/aitbc/production/`
+- ✅ Logs centralized in `/var/log/aitbc/production/`
+- ✅ Repository cleaned of production runtime files
+- ✅ Proper FHS compliance achieved