A thread-DO signal router: (request, scope) => Response | null. null means
the path is not one of ours, so the subclass's route() can compose it ahead
of its own durable-agent routes. scope is the already-asserted
ThreadScope (threadId, tenantId, init) the template-method fetch hands down.
A thread-DO signal router:
(request, scope) => Response | null.nullmeans the path is not one of ours, so the subclass'sroute()can compose it ahead of its own durable-agent routes.scopeis the already-asserted ThreadScope (threadId, tenantId, init) the template-methodfetchhands down.