fix: use standard /var/log/aitbc instead of symlinked /var/lib/aitbc/logs

Standard Logging Directory - Complete:
✅ LOG DIRECTORY STRUCTURE FIXED: Changed from symlinked /var/lib/aitbc/logs to standard /var/log/aitbc
- setup.sh: Updated to create /var/log/aitbc as actual logs directory
- systemd services: Updated all services to use /var/log/aitbc
- Removed symlink: No longer creating symlink from /var/lib/aitbc/logs to /var/log/aitbc
- Reason: /var/log/aitbc is standard Linux location for logs

✅ BEFORE vs AFTER:
❌ Before (Non-standard):
   /var/lib/aitbc/logs/ (created directory)
   /var/log/aitbc -> /var/lib/aitbc/logs/ (symlink)
   systemd ReadWritePaths=/var/lib/aitbc/logs
   Non-standard logging location

✅ After (Standard Linux):
   /var/log/aitbc/ (actual logs directory)
   No symlink needed
   systemd ReadWritePaths=/var/log/aitbc
   Standard Linux logging location

✅ SETUP SCRIPT CHANGES:
📁 Directories: Create /var/log/aitbc instead of /var/lib/aitbc/logs
📋 Permissions: Set permissions on /var/log/aitbc
👥 Ownership: Set ownership on /var/log/aitbc
📝 README: Create README in /var/log/aitbc
🔗 Symlink: Removed symlink creation

✅ SYSTEMD SERVICES UPDATED:
🔧 aitbc-advanced-ai.service: ReadWritePaths=/var/log/aitbc /var/lib/aitbc/data
🔧 aitbc-enterprise-api.service: ReadWritePaths=/var/log/aitbc /var/lib/aitbc/data
🔧 aitbc-multimodal-gpu.service: ReadWritePaths=/var/log/aitbc /var/lib/aitbc/data /dev/nvidia*
🔧 aitbc-web-ui.service: ReadWritePaths=/var/log/aitbc /var/lib/aitbc/data

✅ STANDARD LINUX COMPLIANCE:
📁 /var/log/aitbc: Standard location for application logs
📁 /var/lib/aitbc/data: Standard location for application data
📁 /var/lib/aitbc/keystore: Standard location for secure storage
📁 /etc/aitbc: Standard location for configuration
🎯 FHS Compliance: Follows Linux Filesystem Hierarchy Standard

✅ BENEFITS:
✅ Standard Practice: Uses conventional Linux logging location
✅ Tool Compatibility: Works with standard log management tools
✅ System Integration: Integrates with system logging infrastructure
✅ Monitoring: Compatible with logrotate and monitoring tools
✅ Documentation: Clear and standard directory structure

✅ CODEBASE CONSISTENCY:
📋 Documentation: Already references /var/log/aitbc in many places
🔧 Services: All systemd services now use consistent log path
📝 Scripts: Log scripts and tools work with standard location
🎯 Standards: Follows Linux conventions for logging

RESULT: Successfully updated entire codebase to use standard /var/log/aitbc directory for logs, eliminating non-standard symlinked structure and ensuring Linux FHS compliance.

setup.sh

@@ -91,7 +91,7 @@ setup_runtime_directories() {
         "/var/lib/aitbc"
         "/var/lib/aitbc/keystore"
         "/var/lib/aitbc/data"
-        "/var/lib/aitbc/logs"
+        "/var/log/aitbc"
         "/etc/aitbc"
     )
     
@@ -104,26 +104,23 @@ setup_runtime_directories() {
     chmod 755 /var/lib/aitbc
     chmod 700 /var/lib/aitbc/keystore  # Secure keystore
     chmod 755 /var/lib/aitbc/data
-    chmod 755 /var/lib/aitbc/logs
+    chmod 755 /var/log/aitbc
     chmod 755 /etc/aitbc
     
     # Set ownership
     chown root:root /var/lib/aitbc
     chown root:root /var/lib/aitbc/keystore
     chown root:root /var/lib/aitbc/data
-    chown root:root /var/lib/aitbc/logs
+    chown root:root /var/log/aitbc
     chown root:root /etc/aitbc
     
     # Create README files
     echo "# AITBC Runtime Data Directory" > /var/lib/aitbc/README.md
     echo "# Keystore for blockchain keys (SECURE)" > /var/lib/aitbc/keystore/README.md
     echo "# Application databases" > /var/lib/aitbc/data/README.md
-    echo "# Application logs" > /var/lib/aitbc/logs/README.md
+    echo "# Application logs" > /var/log/aitbc/README.md
     echo "# AITBC Configuration Files" > /etc/aitbc/README.md
     
-    # Create symlink for standard logging
-    ln -sf /var/lib/aitbc/logs /var/log/aitbc
-    
     success "Runtime directories setup completed"
 }
 

systemd/aitbc-advanced-ai.service

@@ -23,7 +23,7 @@ NoNewPrivileges=true
 PrivateTmp=true
 ProtectSystem=strict
 ProtectHome=true
-ReadWritePaths=/var/lib/aitbc/logs /var/lib/aitbc/data
+ReadWritePaths=/var/log/aitbc /var/lib/aitbc/data
 
 # Resource limits
 LimitNOFILE=65536

systemd/aitbc-enterprise-api.service

@@ -23,7 +23,7 @@ NoNewPrivileges=true
 PrivateTmp=true
 ProtectSystem=strict
 ProtectHome=true
-ReadWritePaths=/var/lib/aitbc/logs /var/lib/aitbc/data
+ReadWritePaths=/var/log/aitbc /var/lib/aitbc/data
 
 # Resource limits
 LimitNOFILE=65536

systemd/aitbc-multimodal-gpu.service

@@ -28,7 +28,7 @@ NoNewPrivileges=true
 PrivateTmp=true
 ProtectSystem=strict
 ProtectHome=true
-ReadWritePaths=/var/lib/aitbc/logs /var/lib/aitbc/data /dev/nvidia*
+ReadWritePaths=/var/log/aitbc /var/lib/aitbc/data /dev/nvidia*
 LimitNOFILE=65536
 
 # GPU access

systemd/aitbc-web-ui.service

@@ -27,7 +27,7 @@ NoNewPrivileges=true
 PrivateTmp=true
 ProtectSystem=strict
 ProtectHome=true
-ReadWritePaths=/var/lib/aitbc/logs /var/lib/aitbc/data
+ReadWritePaths=/var/log/aitbc /var/lib/aitbc/data
 LimitNOFILE=65536
 
 # Resource limits