Implement PROXY protocol v1 support in SmartProxy

- Added ProxyProtocolParser class for parsing and generating PROXY protocol v1 headers.
- Integrated PROXY protocol parsing into RouteConnectionHandler for handling incoming connections from trusted proxies.
- Implemented WrappedSocket class to encapsulate real client information.
- Configured SmartProxy to accept and send PROXY protocol headers in routing actions.
- Developed comprehensive unit tests for PROXY protocol parsing and generation.
- Documented usage patterns, configuration, and best practices for proxy chaining scenarios.
- Added security and performance considerations for PROXY protocol implementation.

ts/proxies/smart-proxy/connection-manager.ts

@@ -70,6 +70,7 @@ export class ConnectionManager extends LifecycleComponent {
     
     const connectionId = this.generateConnectionId();
     const remoteIP = socket.remoteAddress || '';
+    const remotePort = socket.remotePort || 0;
     const localPort = socket.localPort || 0;
     const now = Date.now();
 
@@ -85,6 +86,7 @@ export class ConnectionManager extends LifecycleComponent {
       bytesReceived: 0,
       bytesSent: 0,
       remoteIP,
+      remotePort,
       localPort,
       isTLS: false,
       tlsHandshakeComplete: false,