Identity: how data finds its record
How ackDB picks the company an event belongs to, which identifiers can create a record, and where the rest goes.
Orientation
Note
Not written yet. The title, surface badge and description above are the approved ones from the 9 August 2026 docs handoff. The body is still to be written, against the per-subsystem research notes and the page template in that handoff's §7. Nothing here is product truth yet.