Implement protobuf message encoding/decoding (client & server)

Objective

Create efficient protobuf message serialization/deserialization system for both client and server with proper error handling and type safety.

Requirements

• Efficient Serialization: Binary encoding for minimal bandwidth usage
• Type Safety: Strongly-typed message handling preventing serialization errors
• Error Handling: Robust handling of malformed or invalid messages
• Performance: Low-latency encoding/decoding for real-time communication

Technical Details

• Implement protobuf message serialization utilities
• Create message validation and error handling
• Add message compression for large payloads
• Implement proper buffer management
• Add metrics for message size and processing time
• Handle version compatibility and migration

Acceptance Criteria

• Messages serialize/deserialize correctly on both sides
• Invalid messages are handled gracefully
• Performance meets real-time requirements
• Error reporting provides meaningful diagnostics
• Message size is optimized for network efficiency

Milestone Relation

Core component for network communication. Depends on protobuf schema setup and required for WebSocket integration.