v0.7.26 - Tidy up api

src/websockets.h

@@ -38,6 +38,7 @@ struct per_session_data {
     pthread_mutex_t session_lock;           // Per-session thread safety
     char client_ip[CLIENT_IP_MAX_LENGTH];   // Client IP for logging
     int subscription_count;                  // Number of subscriptions for this session
+    time_t connection_established;           // When WebSocket connection was established
 
     // NIP-42 Authentication State
     char authenticated_pubkey[65];           // Authenticated public key (64 hex + null)