Records an owner call after it answered, at the one point every request to the object passes.
A call is an owner call when it carries the owner token the front worker already checked, which
the object checks again here; the internal calls that carry none (provisioning, the claim) and
a diagnostics-only call are not recorded. A rotation presents no token, so its actor is proof.
Never throws: a failed append must not turn an owner call into an error.
Records an owner call after it answered, at the one point every request to the object passes.
A call is an owner call when it carries the owner token the front worker already checked, which the object checks again here; the internal calls that carry none (provisioning, the claim) and a diagnostics-only call are not recorded. A rotation presents no token, so its actor is
proof. Never throws: a failed append must not turn an owner call into an error.