feat(rustproxy): add authenticated VPN route security

ts/core/models/route-context.ts

@@ -16,6 +16,12 @@ export interface IRouteContext {
   domain?: string;       // The domain from SNI or Host header
   clientIp: string;      // The client's IP address
   serverIp: string;      // The server's IP address
+  vpn?: {                // Authenticated VPN identity from trusted PROXY v2 metadata
+    clientId: string;
+    assignedIp: string;
+    transportType?: string;
+    remoteAddr?: string;
+  };
   
   // HTTP specifics (NetworkProxy only)
   path?: string;         // URL path (for HTTP connections)
@@ -88,6 +94,7 @@ export function toBaseContext(httpContext: IHttpRouteContext): IRouteContext {
     domain: httpContext.domain,
     clientIp: httpContext.clientIp,
     serverIp: httpContext.serverIp,
+    vpn: httpContext.vpn,
     path: httpContext.path,
     query: httpContext.query,
     headers: httpContext.headers,
@@ -110,4 +117,4 @@ export function toBaseContext(httpContext: IHttpRouteContext): IRouteContext {
   }
   
   return baseContext;
-}
+}