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/conftest.py

@@ -102,3 +102,62 @@ async def client(test_engine):
     async with AsyncClient(transport=ASGITransport(app=app), base_url="http://test") as ac:
         yield ac
     app.dependency_overrides.clear()
+
+
+# ---------------------------------------------------------------------------
+# Shared entity helpers (workplan-first; legacy workstream names retained)
+# ---------------------------------------------------------------------------
+
+async def create_test_domain(client, slug="infotech", name="Infotech"):
+    r = await client.post("/domains/", json={"slug": slug, "name": name})
+    assert r.status_code == 201, r.text
+    return r.json()
+
+
+async def create_test_topic(client, domain_slug="infotech", slug="testtopic", title="Test Topic"):
+    r = await client.post("/topics/", json={
+        "slug": slug, "title": title, "domain": domain_slug,
+    })
+    assert r.status_code == 201, r.text
+    return r.json()
+
+
+async def create_test_repo(client, domain_slug="infotech", slug="test-repo", **extra):
+    payload = {
+        "domain_slug": domain_slug,
+        "slug": slug,
+        "name": "Test Repo",
+        **extra,
+    }
+    r = await client.post("/repos/", json=payload)
+    assert r.status_code == 201, r.text
+    return r.json()
+
+
+async def create_test_workplan(
+    client,
+    repo_id,
+    topic_id=None,
+    slug="test-wp",
+    title="Test Workplan",
+    status="active",
+    **extra,
+):
+    payload = {"repo_id": repo_id, "slug": slug, "title": title, "status": status, **extra}
+    if topic_id is not None:
+        payload["topic_id"] = topic_id
+    r = await client.post("/workplans/", json=payload)
+    assert r.status_code == 201, r.text
+    return r.json()
+
+
+async def create_test_workstream(client, topic_id=None, repo_id=None, slug="test-wp", **kwargs):
+    """Legacy helper name — creates a repo-anchored workplan."""
+    if repo_id is None:
+        domain = await create_test_domain(client)
+        if topic_id is None:
+            topic = await create_test_topic(client, domain_slug=domain["slug"])
+            topic_id = topic["id"]
+        repo = await create_test_repo(client, domain_slug=domain["slug"], slug=f"{slug}-repo")
+        repo_id = repo["id"]
+    return await create_test_workplan(client, repo_id=repo_id, topic_id=topic_id, slug=slug, **kwargs)