feat: Adding VoyageAI's v3.5 models

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/services/voyageai/VoyageAIModel.java

@@ -21,33 +21,32 @@
 import org.elasticsearch.xpack.inference.services.voyageai.action.VoyageAIActionVisitor;
 
 import java.net.URI;
+import java.util.Collections;
+import java.util.HashMap;
 import java.util.Map;
 import java.util.Objects;
 
 public abstract class VoyageAIModel extends RateLimitGroupingModel {
     private static final String DEFAULT_MODEL_FAMILY = "default_model_family";
-    private static final Map<String, String> MODEL_TO_MODEL_FAMILY = Map.of(
-        "voyage-multimodal-3",
-        "embed_multimodal",
-        "voyage-3-large",
-        "embed_large",
-        "voyage-code-3",
-        "embed_large",
-        "voyage-3",
-        "embed_medium",
-        "voyage-3-lite",
-        "embed_small",
-        "voyage-finance-2",
-        "embed_large",
-        "voyage-law-2",
-        "embed_large",
-        "voyage-code-2",
-        "embed_large",
-        "rerank-2",
-        "rerank_large",
-        "rerank-2-lite",
-        "rerank_small"
-    );
+    private static final Map<String, String> MODEL_TO_MODEL_FAMILY;
+
+    static {
+        Map<String, String> tempMap = new HashMap<>();
+        tempMap.put("voyage-3.5", "embed_medium");
+        tempMap.put("voyage-3.5-lite", "embed_small");
+        tempMap.put("voyage-multimodal-3", "embed_multimodal");
+        tempMap.put("voyage-3-large", "embed_large");
+        tempMap.put("voyage-code-3", "embed_large");
+        tempMap.put("voyage-3", "embed_medium");
+        tempMap.put("voyage-3-lite", "embed_small");
+        tempMap.put("voyage-finance-2", "embed_large");
+        tempMap.put("voyage-law-2", "embed_large");
+        tempMap.put("voyage-code-2", "embed_large");
+        tempMap.put("rerank-2", "rerank_large");
+        tempMap.put("rerank-2-lite", "rerank_small");
+
+        MODEL_TO_MODEL_FAMILY = Collections.unmodifiableMap(tempMap);
+    }
 
     private final SecureString apiKey;
     private final VoyageAIRateLimitServiceSettings rateLimitServiceSettings;