chore: Previews - use database ID instead of URI

[colinmurphy]

Overview

We should look at:

1. Removing "Enable unique post slugs for all post statuses" for maintability
2. Use the database ID in examples instead of URI
3. Ensure database ID is the default setting

[colinmurphy]

@moonmeister FYI

[moonmeister]

Did we ever get comment from Alex on this decision?

[colinmurphy]

@moonmeister

Not yet but we are thinking this might have some maintainability issues. We are not doing this task this sprint until we get the CI pipeline etc all sorted and also get unit and e2e tests along with a roadmap defined 👍

cc @ahuseyn