[Feature] Linking to entity via custom field instead of Id.

[ilnytskyi]

Hello,

I am looking for the solution to link a comment with content type via custom field instead of id.
In my case content type changes it's state and goes to history as snapshot, then replaced with new entity still accessible via same slug and other data. However due to primary id change it's hard to maintain comments.

As I see comments only linked via id in

https://github.com/VirtusLab-Open-Source/strapi-plugin-comments/blob/master/server/services/client.ts#L68

const relatedEntity = await strapi.db
      .query<RelatedEntity>(uid)
      .findOne({ where: { id: relatedId } });

Is there a way to configure the linking field?