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_routers_core.py

@@ -28,19 +28,34 @@ async def _create_topic(client, domain_slug="testdomain", slug="testtopic", titl
     return r.json()
 
 
-async def _create_workstream(client, topic_id, slug="test-ws", title="Test WS", status="active", **extra):
+async def _create_workplan(client, repo_id, topic_id=None, slug="test-ws", title="Test WS", status="active", **extra):
     payload = {
-        "topic_id": topic_id, "slug": slug, "title": title, "status": status,
+        "repo_id": repo_id, "slug": slug, "title": title, "status": status,
     }
+    if topic_id is not None:
+        payload["topic_id"] = topic_id
     payload.update(extra)
-    r = await client.post("/workstreams/", json=payload)
+    r = await client.post("/workplans/", json=payload)
     assert r.status_code == 201, r.text
     return r.json()
 
 
-async def _create_task(client, workstream_id, title="Test task"):
+async def _create_workstream(client, topic_id=None, repo_id=None, slug="test-ws", title="Test WS", status="active", **extra):
+    if repo_id is None:
+        if topic_id is None:
+            await _create_domain(client)
+            topic = await _create_topic(client)
+            topic_id = topic["id"]
+        repo = await _create_repo(client, slug=f"{slug}-repo")
+        repo_id = repo["id"]
+    return await _create_workplan(
+        client, repo_id=repo_id, topic_id=topic_id, slug=slug, title=title, status=status, **extra
+    )
+
+
+async def _create_task(client, workplan_id, title="Test task"):
     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
     return r.json()