feat(DCU_APP): 添加CPU负载监控和EtherCAT诊断功能

- 在DCU_APP项目中添加cpu_load.h和cpu_load.cpp模块用于CPU负载率监测
- 修改csolution配置将构建目标从Debug切换为Release
- 在EtherCAT PDO协议栈中新增段5诊断区（632-639字节），包含负载率和序列号
- 在所有关键中断服务程序中添加CpuLoad::isrEnter()/isrExit()钩子用于准确统计中断占用
- 增强EtherCAT同步中断处理，改进AL事件掩码守护机制，修复OP状态下PDI中断门控问题
- 解决SSC源码中指针地址对齐警告和打包成员访问警告问题
- 在主循环中集成CPU负载率采样tick()调用，实现1秒滚动窗口统计

BREAKING CHANGE: 构建配置从Debug改为Release，EtherCAT协议栈增加新的诊断数据区

GD32E508_DCU_APP/comm/ssc/src/objdef.c

@@ -887,14 +887,15 @@ UINT8 OBJ_Read( UINT16 index, UINT8 subindex, UINT32 objSize, OBJCONST TOBJECT O
             p = (CHAR **) pVarPtr;
             pVarPtr = (UINT16 MBXMEM *)p[subindex-1];
 
-            if((((UINT16)pVarPtr) & 0x1) == 0x1)
+            if((((UINT32)pVarPtr) & 0x1) == 0x1)
             {
                 /*enum is stored at an odd address*/
                 UINT16 cnt = 0;
 
                 //get last even WORD address
 /*ECATCHANGE_START(V5.11) SDO3*/
-                pVarPtr = (UINT16 MBXMEM *)(((MEM_ADDR)pVarPtr)& ~(MEM_ADDR)0x1);
+                /*MEM_ADDR=UINT16 会把 32 位指针截成 16 位,必须用完整位宽清 bit0*/
+                pVarPtr = (UINT16 MBXMEM *)(((UINT32)pVarPtr) & ~(UINT32)0x1);
 /*ECATCHANGE_END(V5.11) SDO3*/
 
                 for(cnt = 0; cnt < (size / 2);cnt++)

GD32E508_DCU_APP/comm/ssc/src/sdoserv.c

@@ -1025,7 +1025,8 @@ UINT8 SDOS_SdoInfoInd( TSDOINFORMATION MBXMEM *pSdoInfoInd )
                     UINT16 n = OBJ_GetNoOfObjects(i);
 
                     /* copy the number of objects of the list type in the SDO Information response */
-                    ((UINT16 MBXMEM *) &pSdoInfoInd->CoeHeader)[(SIZEOF_SDOINFOLISTSTRUCT>>1)+i] = SWAPWORD(n);
+                    /*(UINT32) 中转：对 packed 成员直接取址强转 UINT16 指针会报 -Waddress-of-packed-member(邮箱缓冲实际偶对齐)*/
+                    ((UINT16 MBXMEM *)(UINT32)&pSdoInfoInd->CoeHeader)[(SIZEOF_SDOINFOLISTSTRUCT>>1)+i] = SWAPWORD(n);
                 }
 
                 /* size of the mailbox service response */
@@ -1045,7 +1046,7 @@ UINT8 SDOS_SdoInfoInd( TSDOINFORMATION MBXMEM *pSdoInfoInd )
                         size = u16SendMbxSize - SIZEOF_SDOINFO - MBX_HEADER_SIZE;
                     }
                     /* initialize pData with the pointer where the fragment has to be copied */
-                    pData = &((UINT16 MBXMEM *) &pSdoInfoInd->CoeHeader)[SIZEOF_SDOINFO>>1];
+                    pData = &((UINT16 MBXMEM *)(UINT32)&pSdoInfoInd->CoeHeader)[SIZEOF_SDOINFO>>1];
                     /* initialize index with the next index to be sent */
                     index = nSdoInfoIndex;
                     /* decrement the number of fragments to be sent */
@@ -1063,7 +1064,7 @@ UINT8 SDOS_SdoInfoInd( TSDOINFORMATION MBXMEM *pSdoInfoInd )
                         size = u16SendMbxSize - SIZEOF_SDOINFOLISTSTRUCT - MBX_HEADER_SIZE;
                     }
                     /* initialize pData with the pointer where the fragment has to be copied */
-                    pData = &((UINT16 MBXMEM *) &pSdoInfoInd->CoeHeader)[SIZEOF_SDOINFOLISTSTRUCT>>1];
+                    pData = &((UINT16 MBXMEM *)(UINT32)&pSdoInfoInd->CoeHeader)[SIZEOF_SDOINFOLISTSTRUCT>>1];
                     /*Check if List need to be send in fragments*/
                     if( (n<<1) > size)
                     {