feat(classification-spine): implement STATE-WP-0065 repo-anchored model

Replace the ad-hoc coordination-domain spine with the Repo Classification
Standard: 14 market domains, classification columns on managed_repos, and
workplans anchored by repo_id (topic_id optional).

- Add Alembic migration d8e9f0a1b2c3 with data backfill and workstream→workplan rename
- Add api/classification.py validation and register-from-classification tooling
- Expose workplan-first REST/MCP surface with legacy workstream aliases
- Add C-24 consistency rule and legacy domain frontmatter mapping
- Update dashboard repos page with category/capability/stake filters
- Update orientation docs; mark STATE-WP-0065 finished

SCOPE.md

@@ -2,9 +2,9 @@
 
 ## One-Liner
 
-State Hub is the local-first coordination service for Custodian workstreams,
-tasks, decisions, progress events, repo metadata, MCP tooling, and dashboard
-telemetry.
+State Hub is the local-first coordination service for repo-anchored workplans,
+tasks, decisions, progress events, repo classification and metadata, MCP
+tooling, and dashboard telemetry.
 
 ## In Scope
 
@@ -12,7 +12,8 @@ telemetry.
 - PostgreSQL schema and Alembic migrations
 - FastMCP server and tool reference
 - Observable dashboard
-- repo registration and consistency synchronization
+- repo registration (classification-driven) and consistency synchronization
+- repo classification spine (14 market domains, `.repo-classification.yaml`)
 - task-flow engine and flow definitions
 - SBOM, contribution, capability, TPSC, DoI, token, and interface-change tracking
 - State Hub tests, operational docs, policies, prompts, and local infra