Add support for Flat index config

src/main/java/io/weaviate/client/v1/misc/model/BQConfig.java

@@ -0,0 +1,19 @@
+package io.weaviate.client.v1.misc.model;
+
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.FieldDefaults;
+
+@Getter
+@Builder
+@ToString
+@EqualsAndHashCode
+@FieldDefaults(makeFinal = true, level = AccessLevel.PRIVATE)
+public class BQConfig {
+  Boolean enabled;
+  Long rescoreLimit;
+  Boolean cache;
+}

src/main/java/io/weaviate/client/v1/misc/model/PQConfig.java

@@ -13,13 +13,16 @@
 @EqualsAndHashCode
 @FieldDefaults(makeFinal = true, level = AccessLevel.PRIVATE)
 public class PQConfig {
-
   Boolean enabled;
+  // HNSW index specific settings
   Boolean bitCompression;
   Integer segments;
   Integer centroids;
   Integer trainingLimit;
   Encoder encoder;
+  // Flat index specific settings
+  Long rescoreLimit;
+  Boolean cache;
 
 
   @Getter

src/main/java/io/weaviate/client/v1/misc/model/VectorIndexConfig.java

@@ -25,4 +25,5 @@ public class VectorIndexConfig {
   Integer cleanupIntervalSeconds;
   Boolean skip;
   PQConfig pq;
+  BQConfig bq;
 }