Fix Inefficient Buffer Management and Memory Churn

[devfire]

🐌 PERFORMANCE ABOMINATION

Location: network.rs:194-195

Problem

let mut buffer = vec![0u8; self.config.buffer_size]; // 64KB every message!

Issues

• Allocating 64KB buffer for every single message
• No buffer reuse - massive memory churn
• Stack overflow risk

Suggested Fix

// Use a reusable buffer pool
struct NetworkManager {
    socket: UdpSocket,
    buffer: Vec<u8>, // Reuse this buffer
    multicast_addr: SocketAddr,
    agent_id: String,
    config: NetworkConfig,
}

impl NetworkManager {
    pub async fn receive_message(&self) -> Result<AgentMessage, NetworkError> {
        // Clear and reuse buffer
        self.buffer.clear();
        self.buffer.resize(self.config.buffer_size, 0);

        match self.socket.recv_from(&mut self.buffer).await {
            Ok((bytes_received, sender_addr)) => {
                self.buffer.truncate(bytes_received);
                // ... rest of processing
            }
            // ...
        }
    }
}

Priority: High - Massive memory inefficiency that will cause performance degradation and potential memory exhaustion.