feat(cfold): canonicalize custom test layout

tests/n8n/PARITY.md

@@ -1,13 +1,13 @@
 # Parity — n8n
 
 Phase-2 P2 mapping table: every `references/recipe-maintainer/recipe-info/n8n/tests/*.py` has a
-comparable cc-ci test under `tests/n8n/functional/`, asserting the **same thing** (not a renamed
+comparable cc-ci test under `tests/n8n/custom/`, asserting the **same thing** (not a renamed
 file). The Adversary cold-verifies parity by reading the source `recipe-info/<file>` and the cc-ci
 file side-by-side.
 
 | recipe-maintainer file | cc-ci file | what's verified | status |
 |---|---|---|---|
-| `recipe-info/n8n/tests/health_check.py` | `tests/n8n/functional/test_health_check.py` | The app is reachable over HTTPS and returns a successful response (the original asserted HTTP 200 against a persistent `n8n.<suffix>` host). The cc-ci port preserves the assertion shape — HTTP 200 from the served root — and adapts to the ephemeral per-run domain via the `live_app` fixture. | **ported** |
+| `recipe-info/n8n/tests/health_check.py` | `tests/n8n/custom/test_health_check.py` | The app is reachable over HTTPS and returns a successful response (the original asserted HTTP 200 against a persistent `n8n.<suffix>` host). The cc-ci port preserves the assertion shape — HTTP 200 from the served root — and adapts to the ephemeral per-run domain via the `live_app` fixture. | **ported** |
 
 ## Recipe-specific tests (Phase-2 P3 §4.3 floor: "create-an-object + read-it-back, and one more")
 
@@ -16,9 +16,9 @@ directly: "create a workflow via API, execute it, assert the result." So:
 
 | cc-ci file | what's verified | rationale |
 |---|---|---|
-| `tests/n8n/functional/test_workflow_roundtrip.py` | Owner setup via `POST /rest/owner/setup` with a per-run-generated email + password (class-B run-scoped secret, plan §4.4-B); then `POST /rest/workflows` creates a Manual-Trigger workflow with a unique name; then `GET /rest/workflows/<id>` reads it back; asserts the returned id matches, name matches, nodes payload preserved (type/name of the one node). | **Plan §4.3 prescribed test** — create-an-object + read-it-back, exercising n8n's persistence + retrieval. Non-vacuous: a broken persistence layer would round-trip with wrong shape; a wedged engine that serves the SPA but rejects workflow POSTs fails at the create step. |
-| `tests/n8n/functional/test_rest_settings.py` | Polls `/rest/settings` until response is **application/json** (rejects the "n8n is starting up" SPA placeholder); asserts known public-settings keys (`userManagement`, `defaultLocale`, `authCookie`) in the `data` envelope. | The editor SPA's primary API contract — proves bootstrap surface is intact. Distinct from `test_workflow_roundtrip.py` (which proves persistence); this proves the SPA can come up at all. |
-| `tests/n8n/functional/test_login_state.py` | Polls `/rest/login` until response is **application/json**; asserts JSON dict/list shape — proves the user-management/auth subsystem initialized. | Auth subsystem readiness; distinct from settings (a broken auth backend would let settings return JSON but login would 5xx). |
+| `tests/n8n/custom/test_workflow_roundtrip.py` | Owner setup via `POST /rest/owner/setup` with a per-run-generated email + password (class-B run-scoped secret, plan §4.4-B); then `POST /rest/workflows` creates a Manual-Trigger workflow with a unique name; then `GET /rest/workflows/<id>` reads it back; asserts the returned id matches, name matches, nodes payload preserved (type/name of the one node). | **Plan §4.3 prescribed test** — create-an-object + read-it-back, exercising n8n's persistence + retrieval. Non-vacuous: a broken persistence layer would round-trip with wrong shape; a wedged engine that serves the SPA but rejects workflow POSTs fails at the create step. |
+| `tests/n8n/custom/test_rest_settings.py` | Polls `/rest/settings` until response is **application/json** (rejects the "n8n is starting up" SPA placeholder); asserts known public-settings keys (`userManagement`, `defaultLocale`, `authCookie`) in the `data` envelope. | The editor SPA's primary API contract — proves bootstrap surface is intact. Distinct from `test_workflow_roundtrip.py` (which proves persistence); this proves the SPA can come up at all. |
+| `tests/n8n/custom/test_login_state.py` | Polls `/rest/login` until response is **application/json**; asserts JSON dict/list shape — proves the user-management/auth subsystem initialized. | Auth subsystem readiness; distinct from settings (a broken auth backend would let settings return JSON but login would 5xx). |
 
 Three specific tests, exceeding the ≥2 floor — `test_workflow_roundtrip.py` is the plan §4.3
 prescribed "create + read-back"; the other two are bootstrap-readiness assertions retained from