Set Chat Company Knowledge Audience

Choose who may read what this conversation teaches the company. TOS-4811.

members discloses to the organization at large, so any member reaches it. speaker does not, so a colleague at member role cannot read the contribution; the speaker can, and so can the organization's owners and admins, who read the whole company Mind because they are its authors.

A real change re-derives the company's coverage of this chat, because the audience is written onto the evaluations at extraction time and past writes carry the audience that was in force when they landed.