fix(flagd): Add thread interruption

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

@@ -192,6 +192,7 @@ private void syncFlags(SyncStreamObserver streamObserver) {
             } catch (InterruptedException e) {
                 log.warn("Sync stream interrupted, will restart", e);
                 streamObserver.context.cancel(e);
+                Thread.currentThread().interrupt();
             }
         }
     }