The membership tag on every page of one owner's documents.
Leads every error code: BANK gives BANK_DOCUMENT_NAME_INVALID.
Names the owner in thrown messages: bank gives bank "x" does not exist.
The column whose value names the owner in its S3 keys.
The field a document and every call name the owner by: bankId.
What every owner's root starts with; the root is this, keyName, /.
Each type's segment of the key under the owner's root, in the order
reconcile walks them. "" puts a type at the root itself, whose root
then reserves the names the other types' segments start with.
The dashboard user table updated_by_user_id references.
Who belongs to which workspace: only a member is stamped on its rows.
A live write needs ACTIVE here and no deletedAt.
What the index is told about one kind of owner.