feat: Added new RRF Query helper.

Signed-off-by: Anush008 <[email protected]>

Author: Anush008

src/main/java/io/qdrant/client/QueryFactory.java

@@ -16,6 +16,7 @@
 import io.qdrant.client.grpc.Points.PointId;
 import io.qdrant.client.grpc.Points.Query;
 import io.qdrant.client.grpc.Points.RecommendInput;
+import io.qdrant.client.grpc.Points.Rrf;
 import io.qdrant.client.grpc.Points.Sample;
 import io.qdrant.client.grpc.Points.VectorInput;
 import java.util.List;
@@ -65,6 +66,16 @@ public static Query fusion(Fusion fusion) {
     return Query.newBuilder().setFusion(fusion).build();
   }
 
+  /**
+   * Creates a {@link Query} for reciprocal rank fusion (RRF).
+   *
+   * @param rrf An instance of {@link Rrf}
+   * @return a new instance of {@link Query}
+   */
+  public static Query rrf(Rrf rrf) {
+    return Query.newBuilder().setRrf(rrf).build();
+  }
+
   /**
    * Creates a {@link Query} to order points by a payload field.
    *