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

tests/test_capability_requests.py

@@ -27,17 +27,19 @@ async def _create_topic(client, domain_slug="testdomain"):
     return r.json()
 
 
-async def _create_workstream(client, topic_id):
-    r = await client.post("/workstreams/", json={
-        "topic_id": topic_id, "slug": "test-ws", "title": "Test WS",
-    })
-    assert r.status_code == 201, r.text
-    return r.json()
+from tests.conftest import create_test_repo, create_test_workplan
 
 
-async def _create_task(client, workstream_id, title="Test task", status="wait"):
+async def _create_workstream(client, topic_id, domain_slug="custodian"):
+    repo = await create_test_repo(client, domain_slug=domain_slug, slug="test-repo")
+    return await create_test_workplan(
+        client, repo_id=repo["id"], topic_id=topic_id, slug="test-ws", title="Test WS",
+    )
+
+
+async def _create_task(client, workplan_id, title="Test task", status="wait"):
     r = await client.post("/tasks/", json={
-        "workstream_id": workstream_id, "title": title,
+        "workplan_id": workplan_id, "title": title,
     })
     assert r.status_code == 201, r.text
     task = r.json()