feat: add sessions stats endpoint

apps/server/src/adapters/WebsocketAdapter.ts

@@ -33,6 +33,7 @@ export class SocketServer implements IAdapter {
 
   private wss: WebSocketServer | null;
   private readonly clients: Map<string, Client>;
+  private lastConnection: Date | null = null;
 
   constructor() {
     if (instance) {
@@ -58,6 +59,7 @@ export class SocketServer implements IAdapter {
         path: '',
       });
 
+      this.lastConnection = new Date();
       logger.info(LogOrigin.Client, `${this.clients.size} Connections with new: ${clientId}`);
 
       ws.send(
@@ -171,6 +173,13 @@ export class SocketServer implements IAdapter {
     });
   }
 
+  getStats() {
+    return {
+      connectedClients: this.clients.size,
+      lastConnection: this.lastConnection,
+    };
+  }
+
   private sendClientList(): void {
     const payload = Object.fromEntries(this.clients.entries());
     this.sendAsJson({ type: 'client-list', payload });