Records the re-source and the three decisions inside it: the ACL writing an INGEDIEND record
on submit (without which re-sourcing silently drops every submitted registration), the dedup
key being the projected row rather than the notification, and the notification log holding
the row rather than the event.
Closes out ADR-0028's stated direction and the caveat it left open — the register record was
written but not yet read, and the two had to agree; there is now one source.
not
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