fix: add rel="noopener noreferrer" and JSON response format

- Add rel="noopener noreferrer" to external link in help-model.html
  to prevent reverse-tabnabbing
- Configure ResponseFormat.JSON in BedrockChatRequestParameters
  for consistent structured output with other providers

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: lidiams96

src/main/java/io/jenkins/plugins/explain_error/provider/BedrockProvider.java

@@ -3,6 +3,7 @@
 import dev.langchain4j.model.bedrock.BedrockChatModel;
 import dev.langchain4j.model.bedrock.BedrockChatRequestParameters;
 import dev.langchain4j.model.chat.ChatModel;
+import dev.langchain4j.model.chat.request.ResponseFormat;
 import dev.langchain4j.service.AiServices;
 import edu.umd.cs.findbugs.annotations.CheckForNull;
 import edu.umd.cs.findbugs.annotations.NonNull;
@@ -44,6 +45,7 @@ public Assistant createAssistant() {
                 .defaultRequestParameters(
                         BedrockChatRequestParameters.builder()
                                 .temperature(0.3)
+                                .responseFormat(ResponseFormat.JSON)
                                 .build())
                 .timeout(Duration.ofSeconds(180))
                 .logRequests(LOGGER.isLoggable(Level.FINE))

src/main/resources/io/jenkins/plugins/explain_error/provider/BedrockProvider/help-model.html

@@ -8,6 +8,6 @@
     <li><code>meta.llama3-8b-instruct-v1:0</code> - Llama 3 8B Instruct</li>
     <li><code>us.amazon.nova-lite-v1:0</code> - Amazon Nova Lite</li>
   </ul>
-  See <a href="https://docs.aws.amazon.com/bedrock/latest/userguide/models-supported.html" target="_blank">
+  See <a href="https://docs.aws.amazon.com/bedrock/latest/userguide/models-supported.html" target="_blank" rel="noopener noreferrer">
   AWS Bedrock supported models</a> for the full list.
 </div>