fix(ops): 修复事件重复发布问题并清理遗留代码

1. 移除 OrderStateMachine 中重复的事件发布逻辑
   - OrderStateMachine 不再发布 OrderStateChangedEvent
   - 事件发布统一由 EventPublishHandler 处理

2. 删除 enqueueAndDispatch 遗留方法
   - 该方法已无用，被 DispatchEngine 策略模式替代
   - 删除接口声明、实现类和测试用例

3. 清理无调用的备用接口方法
   - enqueueOrderOnly、dispatchToCleaner、confirmOrder、
     startWorkingOnBeacon、autoCompleteOnSignalLost、
     playVoiceForNewOrder、playVoiceForQueuedOrder、
     playVoiceForNextTask、upgradePriorityToP0、
     calculateActualDuration
   - 保留接口但标记 @Deprecated

问题修复：
- 工单派发时 TTS 语音播报不再重复触发
- 调度逻辑统一走 DispatchEngine 策略模式

Co-Authored-By: Claude (MiniMax-M2.1) <noreply@anthropic.com>

viewsh-module-ops/viewsh-module-environment-biz/src/test/java/com/viewsh/module/ops/environment/service/cleanorder/CleanOrderEndToEndTest.java

@@ -221,36 +221,6 @@ public class CleanOrderEndToEndTest {
         verify(opsOrderMapper, times(1)).insert(any(OpsOrderDO.class));
     }
     
-    // ==========================================
-    // DP-01 ~ DP-03: 智能调度测试 (模拟)
-    // ==========================================
-    
-    @Test
-    void testDP03_P0UrgentInterrupt() {
-        injectField(cleanOrderService, "dispatchEngine", dispatchEngine);
-        injectField(cleanOrderService, "opsOrderMapper", opsOrderMapper);
-
-        // 准备一个 P0 紧急工单
-        Long orderId = 999L;
-        Long cleanerId = 2001L;
-        
-        OpsOrderDO order = OpsOrderDO.builder()
-                .id(orderId)
-                .priority(PriorityEnum.P0.getPriority())
-                .build();
-        orderDB.put(orderId, order);
-        
-        // 模拟调度引擎返回成功
-        when(dispatchEngine.urgentInterrupt(eq(orderId), eq(cleanerId)))
-                .thenReturn(DispatchResult.success("P0插队成功", cleanerId));
-
-        // 执行派单
-        cleanOrderService.enqueueAndDispatch(orderId, cleanerId, true);
-
-        // 验证
-        verify(dispatchEngine).urgentInterrupt(eq(orderId), eq(cleanerId));
-    }
-
     // ==========================================
     // AV-01 ~ AV-03: 到岗校验测试
     // ==========================================