fix(flagd): Properly handle metadata unimplemented status code

Signed-off-by: Guido Breitenhuber <[email protected]>

Author: guidobrei

providers/flagd/src/main/java/dev/openfeature/contrib/providers/flagd/resolver/process/storage/connector/sync/SyncStreamQueueSource.java

@@ -157,7 +157,7 @@ private Struct getMetadata() {
         } catch (StatusRuntimeException e) {
             // In newer versions of flagd, metadata is part of the sync stream. If the method is unimplemented, we
             // can ignore the error
-            if (Status.UNIMPLEMENTED.equals(e.getStatus())) {
+            if (e.getStatus() != null && Status.Code.UNIMPLEMENTED.equals(e.getStatus().getCode())) {
                 return null;
             }