Beta tag on toolChoice with equals and hashcode (#358)

Co-authored-by: Roshin Rajan Panackal <[email protected]>

Author: rpanackal

foundation-models/openai/src/main/java/com/sap/ai/sdk/foundationmodels/openai/OpenAiToolChoice.java

@@ -1,17 +1,21 @@
 package com.sap.ai.sdk.foundationmodels.openai;
 
+import com.google.common.annotations.Beta;
 import com.sap.ai.sdk.foundationmodels.openai.generated.model.ChatCompletionNamedToolChoice;
 import com.sap.ai.sdk.foundationmodels.openai.generated.model.ChatCompletionNamedToolChoiceFunction;
 import com.sap.ai.sdk.foundationmodels.openai.generated.model.ChatCompletionToolChoiceOption;
 import javax.annotation.Nonnull;
 import lombok.AccessLevel;
+import lombok.EqualsAndHashCode;
 import lombok.RequiredArgsConstructor;
 
 /**
  * OpenAi ToolChoice to specify whether to call which tool.
  *
  * @since 1.4.0
  */
+@Beta
+@EqualsAndHashCode
 @RequiredArgsConstructor(access = AccessLevel.PROTECTED)
 public class OpenAiToolChoice {
   @Nonnull final ChatCompletionToolChoiceOption toolChoice;