Move id creation out of actor/reducer

[scally]

When following along with the demo, I noticed that my ids were being recreated each time the app started, and they were never persisted.
I realized that this is because, like with redux, you can't define your ids in your reducers. They have to be part of the payload in the action creator from the beginning.

This was the most straightforward fix, although it's not as tidy.

[ncthbrt]

Hi @scally. Nact doesn't have the problem that redux does in that regard. The persist function can save any arbitrary data, not just the exact message being passed in, which means that it is able to modify the create contact messages to include the id and save them. I believe you have found a legitimate bug in the example code, but it'd be better to solve it in the persist section:

msg.id = newContact.id;
if(!ctx.recovering) { await ctx.persist(msg); }

[scally]

@ncthbrt Thanks for taking a look. I could have sworn I tried something like that already and it didn't work, but I'll look again.