new_id drew a fresh GUID per object, and a stored object carries an id-table
entry per distinct GUID it references in every revision that rewrites it.
Identities now share a GUID per 255 allocations, as OneNote numbers objects
within a session, so content authored in one session costs its containers one
table entry. (The restart soak that exposed the table cost starts a process
per two edits and is unchanged by this: one GUID per launch either way.)

The mixed-client soak verifier predated save coalescing and rejected intents
shared by consecutive operations; it now accounts a coalesced group as one
publication carrying every token, and still rejects a duplicated receipt.

Assisted-by: claude-fable-5.1