feat: enhance ZeroMQ error handling and documentation

[dax-side]

🔄 Changes

ZeroMQ Service Improvements

• Added robust error parsing and validation
• Implemented fallback severity computation
• Enhanced message formatting for Telex notifications
• Added error enrichment with readable messages

Documentation

• Added detailed architecture diagrams
• Updated message flow documentation
• Enhanced API reference
• Improved setup and configuration instructions

🧪 Testing

• Verified ZeroMQ message processing
• Confirmed Telex webhook integration
• Validated error classification logic

📝 Notes

• Requires Node.js 20.x
• ZeroMQ library must be installed