improved ability to use openAiApi to support DeepSeek

Author: ricken07

models/spring-ai-openai/src/main/java/org/springframework/ai/openai/api/OpenAiApi.java

@@ -1323,17 +1323,28 @@ public record TopLogProbs(// @formatter:off
 	 * completion).
 	 * @param promptTokensDetails Breakdown of tokens used in the prompt.
 	 * @param completionTokenDetails Breakdown of tokens used in a completion.
+	 * @param promptCacheHitTokens Number of tokens in the prompt that were served from
+	 * (util for
+	 * <a href="https://api-docs.deepseek.com/api/create-chat-completion">DeepSeek</a>
+	 * support).
+	 * @param promptCacheMissTokens Number of tokens in the prompt that were not served
+	 * (util for
+	 * <a href="https://api-docs.deepseek.com/api/create-chat-completion">DeepSeek</a>
+	 * support).
 	 */
 	@JsonInclude(Include.NON_NULL)
+	@JsonIgnoreProperties(ignoreUnknown = true)
 	public record Usage(// @formatter:off
 		@JsonProperty("completion_tokens") Integer completionTokens,
 		@JsonProperty("prompt_tokens") Integer promptTokens,
 		@JsonProperty("total_tokens") Integer totalTokens,
 		@JsonProperty("prompt_tokens_details") PromptTokensDetails promptTokensDetails,
-		@JsonProperty("completion_tokens_details") CompletionTokenDetails completionTokenDetails) { // @formatter:on
+		@JsonProperty("completion_tokens_details") CompletionTokenDetails completionTokenDetails,
+		@JsonProperty("prompt_cache_hit_tokens") Integer promptCacheHitTokens,
+		@JsonProperty("prompt_cache_miss_tokens") Integer promptCacheMissTokens) { // @formatter:on
 
 		public Usage(Integer completionTokens, Integer promptTokens, Integer totalTokens) {
-			this(completionTokens, promptTokens, totalTokens, null, null);
+			this(completionTokens, promptTokens, totalTokens, null, null, null, null);
 		}
 
 		/**