docs(ecosystem): boundary alignment and route audit (STATE-WP-0074)

Add ecosystem position to INTENT/SCOPE/README, publish hub-ecosystem-route-audit,
update workstream-coordinate capability relations, and record legacy-meter
weekly review evidence.

SCOPE.md

@@ -19,9 +19,22 @@ tooling, and dashboard telemetry.
   token, and interface-change tracking
 - State Hub tests, operational docs, policies, prompts, and local infra
 
+## Ecosystem position
+
+| Repo | Role |
+| --- | --- |
+| `hub-core` | Shared library — State Hub mounts router factories and MCP from `hub_core` |
+| `state-hub` | This repo — dev coordination host, workplan file authority |
+| `core-hub` | Production framework — `/api/v2` at `hub.coulomb.social`; does not replace State Hub dev MCP |
+
+Canon: `/home/worsch/the-custodian/docs/hub-ecosystem-architecture.md`
+
+State Hub does **not** implement Inter-Hub `/api/v2` routes; those belong to core-hub.
+
 ## Out Of Scope
 
 - Custodian canon and constitution content
+- Inter-Hub `/api/v2` framework routes (owned by `core-hub`)
 - non-State-Hub domain implementation work
 - external publication or legal/financial commitments
 - plaintext secrets