Change the caller's own name, narrative language, entry size or day zone

The caller's own name, narrative language and entry size, and nobody else's: no route takes another person's id for any of them. At least one of the three is sent. The name is written to WorkOS first, the text up to the first space as the first name and the rest as the last name, and to our row only when WorkOS took it, so later sign-ins carry the same name. WorkOS refusing is a 502 (a 429 while it rate limits), and a deploy with no WorkOS key a 503; in both cases nothing is written. narrative_language is the language the caller's own narratives are written in where the matter names none, ahead of the firm's default; null returns them to the firm's default. Every role sets their own; it is served as member.narrative_language, and WorkOS is not involved. entry_size is how much related work the caller's Generate groups into one entry (more for small entries, balanced, fewer for large ones), read when each Generate and regeneration starts; null returns them to the served default. It is served as member.entry_size. time_zone is the zone the caller's days are cut in, a named IANA id (Europe/Amsterdam; no Etc/ id and no offset, 400 otherwise): it applies from the caller's next local date, served as member.time_zone_next and member.time_zone_next_from until that day opens; days already opened keep their zone (ruling 6.2).