feat: 更新项目配置，升级Java版本至21，添加Lombok注解处理器，优化设备状态解析和任务更新逻辑

src/main/resources/mapper/agent/LinkTaskMapper.xml

@@ -82,6 +82,14 @@
         WHERE id = #{id}
     </update>
 
+    <!-- 仅当新点数更大时更新，减少写冲突和无效更新 -->
+    <update id="updatePointsIfGreater">
+        UPDATE link_task
+        SET completed_points = #{newPoints}, updated_at = NOW()
+        WHERE id = #{id}
+          AND (completed_points IS NULL OR completed_points &lt; #{newPoints})
+    </update>
+
     <select id="findByAgentId" resultMap="LinkTaskMap">
         SELECT id, batch_id, agent_id, code_no, token_hash, expire_at, status, region, machine_id, login_at, refund_at, revoked_at, created_at, updated_at, need_refresh, refresh_time, qr_created_at, qr_expire_at, first_region_select_at, completed_points, completion_images
         FROM link_task