Turn a decision into a short doc

Write a short decision record.

Decision: {{decision}}
Alternatives considered: {{alternatives}}

Four short sections: context, the decision, why the alternatives lost, and what
would make us revisit it. That last one is the part people skip and the part
future readers need most.

No more than 250 words. Write it so someone joining in a year understands the
constraint we were under, not just the conclusion.

What to fill in

{{decision}}

The decision — e.g. prompts sync through the existing CloudKit zone

{{alternatives}}

What else was considered — e.g. a separate zone; a server-side store