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

workplans/STATE-WP-0065-repo-anchored-classification-spine.md

@@ -4,11 +4,13 @@ type: workplan
 title: "Repo-anchored classification spine (CUST-WP-0050 implementation)"
 domain: custodian
 repo: state-hub
-status: ready
+status: finished
 owner: custodian
 topic_slug: custodian
 created: "2026-06-22"
 updated: "2026-06-22"
+started: "2026-06-22"
+finished: "2026-06-22"
 state_hub_workstream_id: "8dc7d106-11e2-41df-b512-89ed69d2a65f"
 ---
 
@@ -47,7 +49,7 @@ repo-owned files (ADR-001).
 
 ```task
 id: STATE-WP-0065-T01
-status: todo
+status: done
 priority: high
 state_hub_task_id: "14cf65f1-e5af-4905-8de4-bc8986ef078e"
 ```
@@ -82,7 +84,7 @@ dry-run report is reviewed, and a tested downgrade path exists.
 
 ```task
 id: STATE-WP-0065-T02
-status: todo
+status: done
 priority: high
 state_hub_task_id: "d3afcae1-d47e-42f1-bad8-1de4bd1f126a"
 ```
@@ -103,7 +105,7 @@ are green.
 
 ```task
 id: STATE-WP-0065-T03
-status: todo
+status: done
 priority: high
 state_hub_task_id: "bab90f0c-238e-4f43-b34c-a8cdd8faf0e6"
 ```
@@ -122,7 +124,7 @@ emits a report of registered / updated / skipped / invalid.
 
 ```task
 id: STATE-WP-0065-T04
-status: todo
+status: done
 priority: medium
 state_hub_task_id: "67c54009-823d-466b-beaf-f27351c279f4"
 ```