Type Alias: AdvisoryLockKey

AdvisoryLockKey = unknown

What names a lock. Anything reducible to a stable identity: a string, an id, a ["invoice", id] pair, a config object, or an explicit bigint to interoperate with another implementation’s published lock id.

One value or many: an array is read as multiple parts, anything else as a single part. So ["invoice", 7] and "invoice_7" are different locks, since the canonical form sees different structure.