fix: 修正PostgreSQL时间函数CAST为::类型转换，避免语法错误

openhis-server-new/openhis-domain/src/main/resources/mapper/administration/ScheduleSlotMapper.xml

@@ -298,7 +298,7 @@
                 AND o.phone LIKE CONCAT('%', #{query.phone}, '%')
             </if>
             <!-- 5. 核心：按系统时间过滤，只返回未过期的号源 -->
-            AND (p.schedule_date > CURRENT_DATE OR (p.schedule_date = CURRENT_DATE AND s.expect_time >= CAST(CURRENT_TIME AS TIME)))
+            AND (p.schedule_date > CURRENT_DATE OR (p.schedule_date = CURRENT_DATE AND s.expect_time >= CURRENT_TIME::TIME))
             <!-- 6. 状态过滤 -->
             <if test="query.status != null and query.status != '' and query.status != 'all'">
                 <choose>