feat: add json validation

Author: sloesekann

backend/src/main/java/ch/xxx/aidoclibchat/usecase/service/FunctionService.java

@@ -87,7 +87,7 @@ private FunctionResult functionCallText(String question) {
 	private FunctionResult functionCallJson(String question) {
 		var result = this.chatClient.prompt().user(this.promptStr + question).tools(FunctionConfig.OPEN_LIBRARY_CLIENT)
 				.call().entity(new ParameterizedTypeReference<List<JsonResult>>() {
-				});
+				}, spec -> spec.validateSchema());
 		return new FunctionResult(null, result);
 	}
 }

backend/src/main/java/ch/xxx/aidoclibchat/usecase/service/SiteSummaryService.java

@@ -34,7 +34,7 @@ public SiteSummaryService(Builder builder) {
     }
 
     public SiteSummaryDto getJokeAboutTopic(String topic) {
-        var result = this.chatClient.prompt(this.promptStr + topic).call().entity(SiteSummaryDto.class);
+        var result = this.chatClient.prompt(this.promptStr + topic).call().entity(SiteSummaryDto.class, spec -> spec.validateSchema());
         return result;
     }
 }