Consider using RNG to generate the Id value instead of Guid

[benfoster]

Since the value of the underlying Guid is never exposed, we could consider using a Random Number Generator to generate the Id value. This would also have the benefit of being stronger cryptographically and more random though may influence performance negatively.

[benfoster]

@khellang keen to hear your thoughts on this one

[khellang]

The reason Guid was used in the first place, is that the original code was just a Base32 encoding/decoding of existing Guid in storage/memory. After introducing a separate data type, I don't see a need to rely on Guid anymore.

I'm not sure 100% random is the best trade-off, though. What about index fragmentation (sequential guids?) or sortability (ULID?). Once you've freed yourself from the shackles of UUIDv4, I think you need to consider these trade-offs.