testing, disable the refresh key call, see if we can reproduce the same issue

Author: lizk886

src/main/java/com/uid2/operator/model/KeyManager.java

@@ -126,7 +126,10 @@ public KeysetKey getRefreshKey() {
     }
 
     public KeysetKey getRefreshKey(Instant asOf) {
-        KeysetKey key = this.keysetKeyStore.getSnapshot().getActiveKey(Const.Data.RefreshKeysetId, asOf);
+        // TEMPORARY: Simulate keyset key unavailability to reproduce Univision issue
+        KeysetKey key = null; // Force key to be null to trigger exception
+        
+        // KeysetKey key = this.keysetKeyStore.getSnapshot().getActiveKey(Const.Data.RefreshKeysetId, asOf);
         if (key == null) {
             if (keyAvailabilityHandler != null) keyAvailabilityHandler.accept(false);
             throw new NoActiveKeyException(String.format("Cannot get a refresh key with keyset ID %d.", Const.Data.RefreshKeysetId));