fix: Replace @APinote with <p> in Javadoc comments.

@APinote is an unregistered custom tag, breaking Javadoc generation

PiperOrigin-RevId: 846132645

Author: mazas-google

a2a/src/main/java/com/google/adk/a2a/A2AClient.java

@@ -25,8 +25,8 @@
 /**
  * A thin HTTP client for interacting with an A2A-compliant agent endpoint.
  *
- * @apiNote **EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do
- *     not use in production code.
+ * <p>**EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do not
+ * use in production code.
  */
 public final class A2AClient {
 

a2a/src/main/java/com/google/adk/a2a/A2ASendMessageExecutor.java

@@ -32,8 +32,8 @@
 /**
  * Shared SendMessage execution between HTTP service and other integrations.
  *
- * @apiNote **EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do
- *     not use in production code.
+ * <p>**EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do not
+ * use in production code.
  */
 public final class A2ASendMessageExecutor {
   private static final Logger logger = LoggerFactory.getLogger(A2ASendMessageExecutor.class);

a2a/src/main/java/com/google/adk/a2a/RemoteA2AAgent.java

@@ -47,8 +47,8 @@
  *   <li>Session state management across requests
  * </ul>
  *
- * @apiNote **EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do
- *     not use in production code.
+ * <p>**EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do not
+ * use in production code.
  */
 public class RemoteA2AAgent extends BaseAgent {
 

a2a/src/main/java/com/google/adk/a2a/converters/ConversationPreprocessor.java

@@ -21,8 +21,8 @@
  * <p>This mirrors the Python A2A implementation where the in-flight user message is maintained
  * separately from the persisted transcript.
  *
- * @apiNote **EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do
- *     not use in production code.
+ * <p>**EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do not
+ * use in production code.
  */
 public final class ConversationPreprocessor {
 

a2a/src/main/java/com/google/adk/a2a/converters/EventConverter.java

@@ -16,8 +16,8 @@
 /**
  * Converter for ADK Events to A2A Messages.
  *
- * @apiNote **EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do
- *     not use in production code.
+ * <p>**EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do not
+ * use in production code.
  */
 public final class EventConverter {
   private static final Logger logger = LoggerFactory.getLogger(EventConverter.class);

a2a/src/main/java/com/google/adk/a2a/converters/PartConverter.java

@@ -23,8 +23,8 @@
 /**
  * Utility class for converting between Google GenAI Parts and A2A DataParts.
  *
- * @apiNote **EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do
- *     not use in production code.
+ * <p>**EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do not
+ * use in production code.
  */
 public final class PartConverter {
   private static final Logger logger = LoggerFactory.getLogger(PartConverter.class);

a2a/src/main/java/com/google/adk/a2a/converters/RequestConverter.java

@@ -19,8 +19,8 @@
  * rfe Converter for A2A Messages to ADK Events. This is used on the A2A service side to convert
  * incoming A2A requests to ADK Events.
  *
- * @apiNote **EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do
- *     not use in production code.
+ * <p>**EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do not
+ * use in production code.
  */
 public final class RequestConverter {
   private static final Logger logger = LoggerFactory.getLogger(RequestConverter.class);

a2a/src/main/java/com/google/adk/a2a/converters/ResponseConverter.java

@@ -19,8 +19,8 @@
 /**
  * Utility for converting ADK events to A2A spec messages (and back).
  *
- * @apiNote **EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do
- *     not use in production code.
+ * <p>**EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do not
+ * use in production code.
  */
 public final class ResponseConverter {
   private static final Logger logger = LoggerFactory.getLogger(ResponseConverter.class);

a2a/webservice/src/main/java/com/google/adk/webservice/A2ARemoteApplication.java

@@ -7,8 +7,8 @@
 /**
  * Entry point for the standalone Spring Boot A2A service.
  *
- * @apiNote **EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do
- *     not use in production code.
+ * <p>**EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do not
+ * use in production code.
  */
 @SpringBootApplication
 @Import(A2ARemoteConfiguration.class)

a2a/webservice/src/main/java/com/google/adk/webservice/A2ARemoteConfiguration.java

@@ -24,8 +24,8 @@
  *   <li>Add optional remote-proxy wiring for cases where no local agent bean is available.
  * </ul>
  *
- * @apiNote **EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do
- *     not use in production code.
+ * <p>**EXPERIMENTAL:** Subject to change, rename, or removal in any future patch release. Do not
+ * use in production code.
  */
 @Configuration
 @ComponentScan(basePackages = "com.google.adk.webservice")