fix: javadoc issues uncovered when using -Prelease

Author: kabir

extras/task-store-database-jpa/src/main/java/io/a2a/extras/taskstore/database/jpa/JpaDatabaseTaskStore.java

@@ -96,10 +96,12 @@ public void delete(String taskId) {
      * Determines if a task is considered active for queue management purposes.
      * <p>
      * A task is active if:
+     * </p>
      * <ul>
      *   <li>Its state is not final, OR</li>
      *   <li>Its state is final but it was finalized within the grace period</li>
      * </ul>
+     * <p>
      * The grace period handles the race condition where events are published to Kafka
      * while a task is active, but consumed on a replica node after the task is finalized.
      * </p>

server-common/src/main/java/io/a2a/server/tasks/TaskStateProvider.java

@@ -28,7 +28,7 @@ public interface TaskStateProvider {
      * </p>
      * <ul>
      *     <li>Its state is not final, OR</li>
-     *     <li>Its state is final but finalized within the grace period (now < finalizedAt + gracePeriod)</li>
+     *     <li>Its state is final but finalized within the grace period (now &lt; finalizedAt + gracePeriod)</li>
      * </ul>
      * <p>
      * This method is used to decide whether to process late-arriving events.