Name history: publications

[vangberg]

WIP

Abandoned soft-deletable attempt

Value flow

(no record) → PublicationName(unlinked_at: nil)

↓ Version#operation

'create'

Version#changeset

{}

↓ PublicHistory#changes_for(version)

{
  'linked' => [false, true]
}

Unlinked

PublicationName#unlinked_at

nil → '2026-10-08T12:00:00Z'

↓ Version#changeset — operation: 'update'

{
  'unlinked_at' => [nil, '2026-10-08T12:00:00Z']
}

↓ PublicHistory#changes_for(version)

{
  'linked' => [true, false]
}

Emended

PublicationName#emends

false → true

↓ Version#changeset — operation: 'update'

{
  'emends' => [false, true]
}

↓ PublicHistory#changes_for(version)

{
  'emends' => [false, true]
}