Establish the repo for the completed Phase 0-3 build

Settles the design repository now that the self-upgrade build is on main:
- Records the two decisions that shipped without a record — ADR 0077 (the
  controller/foundation/node vocabulary) and ADR 0078 (the store and broker are
  ordinary modules); accepts ADR 0075 and 0076, which shipped work rests on.
- Fills issue 051's amended-design and wires ADR 0078 into 07-the-foundation.
- Sweeps the repo rename (mesh-control -> mesh-controller) into the mutable docs
  now that the forge repo is renamed; updates the glossary note and repos.md.
- Fixes the six broken links from the design-doc renames, indexes the glossary,
  regenerates the decisions reading order.

Both checks (records.py, index.py) are green. Statuses stay honest: the build is
on main and lab-proven but not deployed as the production mesh, so the to-be docs
remain in-progress and the as-is layer (the hal mesh) is unchanged — graduation
to implemented + as-is belongs to deployment, not merge.

https://claude.ai/code/session_01D6qtiYU3P9jk3pnAXyAFyx

02-DECISIONS/0031-the-control-plane-authenticates-nobody.md

@@ -18,7 +18,7 @@ conditional, and said exactly why:
 |---|---|---|
 | identity provider | — | **conditional**: substrate only if the control plane delegates authentication, which is undecided |
 
-[`07-the-substrate.md`](../03-DESIGN/01-to-be/07-the-substrate.md) carried it as an open question —
+[`07-the-foundation.md`](../03-DESIGN/01-to-be/07-the-foundation.md) carried it as an open question —
 *whether identity is the fifth* — noting it followed from a decision nobody had taken.
 
 **The decision is taken: the control plane does not delegate authentication.** There is no mesh