docs(teams): phase 7 as built — five amendments to §7.1

The command that proves the seam is the MODULE's `/guild`, not core's `/team`:
§7.1 was written before phase 3 settled that Teams is a contract primitive with
no core surface, and a core `/team` publishes the same invented noun that got
core's Team pages deleted. Its deep link comes from `pageUrlTemplate` for the
same reason — `/teams/:slug` does not exist.

The re-register nudge is its own bot endpoint rather than a ride on
`/internal/config`, whose body carries the decrypted bot token. `actor` carries
`role` beside `isStaff`, since a module with its own audience rungs cannot place
a caller from a boolean. And "deregistration is free" needed a second half: it
holds across the restart an uninstall asks for, not across the runtime toggle,
so liveness is asked at both the pull and the dispatch.

MODULE_API.md stops saying `registerSlashCommands` throws and documents it —
every member of 1.6.0 is live now.

Co-Authored-By: Claude <noreply@anthropic.com>

website/BACKEND_DESIGN.md

@@ -674,7 +674,7 @@ are authoritative, and they answer different questions:
 
 | Artifact | Source of truth for | Generated by |
 |---|---|---|
-| `server/routes.manifest.json` — mirrored as [api-route-inventory.json](./api-route-inventory.json) | **What URLs CORE serves.** 166 public routes + 2 on the internal listener, sorted, method + path only. | `npm run routes:manifest`, by walking the live Express stack |
+| `server/routes.manifest.json` — mirrored as [api-route-inventory.json](./api-route-inventory.json) | **What URLs CORE serves.** Every core URL — the public app plus the internal listener — sorted, method + path only. | `npm run routes:manifest`, by walking the live Express stack |
 | `server/swagger/swagger-output.json` — merged into `/api/docs` | **What each core route means.** Parameters, bodies, response codes, security. | `npm run swagger`, from `#swagger.*` annotations |
 
 Both are **core's**. An installed module's routes are in neither: they are in that module's own