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_recently_on_scope.py

@@ -20,14 +20,18 @@ async def _create_topic(client, domain_slug="digest", slug="digest-topic", title
     return response.json()
 
 
-async def _create_workstream(client, topic_id, slug="digest-ws", title="Digest Workstream"):
-    response = await client.post("/workstreams/", json={"topic_id": topic_id, "slug": slug, "title": title})
-    assert response.status_code == 201, response.text
-    return response.json()
+from tests.conftest import create_test_repo, create_test_workplan
 
 
-async def _create_task(client, workstream_id, title="Digest task"):
-    response = await client.post("/tasks/", json={"workstream_id": workstream_id, "title": title})
+async def _create_workstream(client, topic_id, slug="digest-ws", title="Digest Workstream", domain_slug="digest"):
+    repo = await create_test_repo(client, domain_slug=domain_slug, slug=f"{slug}-repo")
+    return await create_test_workplan(
+        client, repo_id=repo["id"], topic_id=topic_id, slug=slug, title=title,
+    )
+
+
+async def _create_task(client, workplan_id, title="Digest task"):
+    response = await client.post("/tasks/", json={"workplan_id": workplan_id, "title": title})
     assert response.status_code == 201, response.text
     return response.json()
 
@@ -277,12 +281,16 @@ class TestRecentlyOnScopeRoutes:
 
         await _create_domain(client, slug="broken", name="Broken Domain")
         broken_topic = await _create_topic(client, domain_slug="broken", slug="broken-topic")
-        broken_workstream = await _create_workstream(client, broken_topic["id"], slug="broken-ws")
+        broken_workstream = await _create_workstream(
+            client, broken_topic["id"], slug="broken-ws", domain_slug="broken",
+        )
         await _create_task(client, broken_workstream["id"], title="Broken source")
 
         await _create_domain(client, slug="good", name="Good Domain")
         good_topic = await _create_topic(client, domain_slug="good", slug="good-topic")
-        good_workstream = await _create_workstream(client, good_topic["id"], slug="good-ws")
+        good_workstream = await _create_workstream(
+            client, good_topic["id"], slug="good-ws", domain_slug="good",
+        )
         await _create_task(client, good_workstream["id"], title="Good source")
 
         response = await client.post("/recently-on-scope/hourly", json={"range": "1d"})