The storage encoding a date-bearing attribute is declared to use.
DynamoDB has no date type (M80 plan §1A F7 — a JS Date sent raw is a
ValidationException), so a stored timestamp is a string or a number and
the adapter cannot know which without a declaration.
Definition
"iso" | "epochMs"
Usage
import { type DynamoDateEncoding } from "database-plugin/src/index.ts";