feat: 新增预警与附件模块，优化工位派工功能

1. 新增预警规则、预警消息、业务附件数据库表与CRUD逻辑
2. 为拧紧记录添加审核人、审核时间字段及审核留痕功能
3. 优化产线点位类型与编号描述，更新工位组合下发菜单名称为工艺路线派工
4. 新增上传文件获取原文件名与大小的工具方法
5. 在系统管理菜单新增预警中心与附件中心入口

bj_power_mes/internal/logic/attachment.go

@@ -0,0 +1,39 @@
+package logic
+
+import (
+	"context"
+
+	"bj_power_mes/ent"
+	"bj_power_mes/ent/attachment"
+)
+
+// AddAttachment 新增附件记录
+func (s *Service) AddAttachment(ctx context.Context, bizType, bizId, fileName, filePath string, fileSize int, uploader string) (*ent.Attachment, error) {
+	return s.ctx.EntClient.Attachment.Create().
+		SetBizType(bizType).SetBizId(bizId).SetFileName(fileName).
+		SetFilePath(filePath).SetFileSize(fileSize).SetUploader(uploader).Save(ctx)
+}
+
+// ListAttachments 按业务类型/ID 查询附件
+func (s *Service) ListAttachments(ctx context.Context, bizType, bizId string) ([]*ent.Attachment, error) {
+	q := s.ctx.EntClient.Attachment.Query()
+	if bizType != "" {
+		q = q.Where(attachment.BizType(bizType))
+	}
+	if bizId != "" {
+		q = q.Where(attachment.BizId(bizId))
+	}
+	return q.Order(ent.Desc(attachment.FieldCreatedAt), ent.Desc(attachment.FieldID)).All(ctx)
+}
+
+// DeleteAttachment 删除附件记录并返回记录（供删除物理文件）
+func (s *Service) DeleteAttachment(ctx context.Context, id int) (*ent.Attachment, error) {
+	att, err := s.ctx.EntClient.Attachment.Get(ctx, id)
+	if err != nil {
+		return nil, err
+	}
+	if err := s.ctx.EntClient.Attachment.DeleteOneID(id).Exec(ctx); err != nil {
+		return nil, err
+	}
+	return att, nil
+}