Are Nuxt Content V3 Document IDs Reliable for External References?

[khawarizmus]

Background

Nuxt Content V3 automatically assigns unique IDs to documents in its underlying database system. I'm considering using these IDs as reference pointers in my backend system.

Questions

How reliable and consistent are these automatically generated document IDs?
What happens to document IDs in specific scenarios:

When a document is deleted, is its ID permanently retired?
Can newly added documents reuse IDs from previously deleted documents?

Use Case Context

I need to understand the ID behavior to determine if they're suitable for use as stable references in external systems, particularly our backend services.