Accept ADR 0110 and ADR 0111; the seats design is in progress

The seats half of to-be 27's review is settled, so the two records it rests on are accepted and
the vocabulary catches up: the glossary's *seat* becomes a named role from a closed set, held by
an assignment and possibly delivering a provision, and 23 — Choosing a provider gains the seat
step in resolution, with ambiguity still refused rather than guessed. Both were held back when
0110 was proposed, because a document may not rest on a record that is not accepted.

26 — The seats moves to in-progress rather than designed: it names the files that implement it,
and naming a file claims implementation, which is only defensible once those files are on the
owning repositories' main branches. It becomes implemented when mesh-controller #63 and
mesh-catalog #69 land.

0112, 0113 and 0114 stay proposed; to-be 27 stays proposed with them.

00-META/glossary.md

@@ -44,15 +44,22 @@ another — and a mesh you cannot name precisely is a mesh two people describe d
 
 ## How modules relate to the mesh
 
-- **seat** — a named position at a scope (node / site / mesh) with a **capacity**. A capacity-1 seat
-  is exclusive (one holder); a higher-capacity seat is a **bench** (several holders coexist).
+- **seat** — a named role at a scope (node / site / mesh), held by a module assignment, from a
+  **closed set** the mesh defines: a claim naming a seat outside the set is refused. A seat may
+  **deliver a provision**, and its holder is then the mesh's answer for it when several modules
+  provide it ([ADR 0110](../02-DECISIONS/0110-a-seat-is-a-module-assignment-from-a-closed-set.md)).
+  The set, with who holds each seat, is the overview of what a mesh has
+  ([26 — The seats](../03-DESIGN/01-to-be/26-the-seats.md)). A seat has a **capacity**: a
+  capacity-1 seat is exclusive (one holder); a higher-capacity seat is a **bench** (several holders
+  coexist).
 - **claim** — a module taking a spot on a seat. `claims: [{name, scope}]` in a manifest. A
   mesh-scoped exclusive claim is how the mesh says "there is one of me". A foundation seat is
   named after the server it guards: the `mesh-controller`, `postgres` and `lavinmq` modules claim
   the `mesh-controller`, `mesh-store` and `mesh-broker` seats ([ADR 0079](../02-DECISIONS/0079-the-foundation-seats-are-named-after-their-servers.md)).
 - **provision** — a service one module `provides` and others `require`; the mesh resolves a provider
-  and wires the two with an endpoint and a credential. This is separate from seats: a provision is
-  a service you offer, a seat is a slot you occupy.
+  and wires the two with an endpoint and a credential. A provision is a service you offer, a seat
+  is a role you occupy, and the two meet where a seat delivers a provision: occupying the seat is
+  what makes a module *the* provider of it.
 
 ## How this page is kept