feat: signal server tag

toju-app/src/app/domains/server-directory/application/services/server-endpoint-state.service.ts

@@ -228,7 +228,8 @@ export class ServerEndpointStateService {
     endpointId: string,
     status: ServerEndpoint['status'],
     latency?: number,
-    versions?: ServerEndpointVersions
+    versions?: ServerEndpointVersions,
+    serverTag?: string
   ): void {
     this._servers.update((endpoints) => ensureCompatibleActiveEndpoint(endpoints.map((endpoint) => {
       if (endpoint.id !== endpointId) {
@@ -240,6 +241,7 @@ export class ServerEndpointStateService {
         instanceId: versions?.serverInstanceId ?? endpoint.instanceId,
         status,
         latency,
+        serverTag: serverTag ?? endpoint.serverTag,
         isActive: status === 'incompatible' && !endpoint.isDefault ? false : endpoint.isActive,
         serverVersion: versions?.serverVersion ?? endpoint.serverVersion,
         clientVersion: versions?.clientVersion ?? endpoint.clientVersion