feat(import): 批量导入功能增加公司ID参数支持

- 为所有批量导入接口增加可选的companyId参数
- 在导入过程中将companyId设置到实体对象中
- 修复客户导入时的租户ID冲突处理逻辑
- 添加数据完整性验证异常处理机制
- 实现字符串字段的标准化处理功能
- 优化重复数据检测和更新逻辑

src/main/java/com/gxwebsoft/credit/controller/CreditCompetitorController.java

@@ -135,7 +135,8 @@ public class CreditCompetitorController extends BaseController {
     @PreAuthorize("hasAuthority('credit:creditCompetitor:save')")
     @Operation(summary = "批量导入竞争对手")
     @PostMapping("/import")
-    public ApiResult<List<String>> importBatch(@RequestParam("file") MultipartFile file) {
+    public ApiResult<List<String>> importBatch(@RequestParam("file") MultipartFile file,
+                                               @RequestParam(value = "companyId", required = false) Integer companyId) {
         List<String> errorMessages = new ArrayList<>();
         int successCount = 0;
 
@@ -159,6 +160,9 @@ public class CreditCompetitorController extends BaseController {
                 try {
                     CreditCompetitor item = convertImportParamToEntity(param);
 
+                    if (item.getCompanyId() == null && companyId != null) {
+                        item.setCompanyId(companyId);
+                    }
                     if (item.getUserId() == null && currentUserId != null) {
                         item.setUserId(currentUserId);
                     }