feat: Enhance RelayHub component with subscription count details (still not working)

- Update RelayHubStatus.vue to display both local and global subscription counts, improving user visibility into active subscriptions.
- Add totalSubscriptionCount computed property in useRelayHub.ts to track the total number of subscriptions.
- Implement totalSubscriptionCount getter in relayHub.ts to return the size of the subscriptions map.
- Include debug logging in relayHub.ts for connected relay counts and statuses to aid in troubleshooting.

src/components/RelayHubStatus.vue

@@ -56,7 +56,10 @@
 
     <div class="subscription-info">
       <h4>Active Subscriptions</h4>
-      <div class="subscription-count">{{ activeSubscriptions.size }}</div>
+      <div class="subscription-count">
+        <div>Local: {{ activeSubscriptions.size }}</div>
+        <div>Global: {{ totalSubscriptionCount }}</div>
+      </div>
     </div>
   </div>
 </template>
@@ -72,6 +75,7 @@ const {
   activeSubscriptions,
   connectedRelayCount,
   totalRelayCount,
+  totalSubscriptionCount,
   connectionHealth,
   connect,
   disconnect,