docs: add RD-37 — five a11y suppressions name a ticket that closed

Found while measuring RD-30, which archives the directory these references
point into.

Five stories disable the axe check with the reason "WP-11 reworks this
markup". WP-11 is done, and so is WP-13, the gap register it handed the
remainder to. No open ticket owns the defect, so the rule that a disabled
check must name the ticket that removes it holds only in letter.

The defect ships: `app-choice-link` and `app-aanvraag-block` put a component
host between the keuzelijst `<ul>` and its `<li>`, which breaks axe's
list/listitem rule. WP-11 solved the same problem for `application-link` by
making the host be the `<li>`, but `atomic-design.mdx` documents the current
split as deliberate — so whether that move fights the vendored CSS is the
question RD-37 must answer first.

Sequenced before RD-30.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

docs/project/readable-codebase/README.md

@@ -131,6 +131,7 @@ two. Note that RD-15 exists because 22 abandoned agent worktrees are still on di
 | RD-34 | _(optional)_ `NO_SUBORGS`/`NO_TABLES` become `RemoteData.Empty`              | 11         |           | todo   |
 | RD-35 | _(optional, last, alone)_ upload `type:` discriminant to `tag:`              | 27         |           | todo   |
 | RD-36 | `ui/dashboard/` → `ui/overzicht-secties/` + 2 stale `dashboard.page` paths   | 04         | yes       | todo   |
+| RD-37 | **a11y:** 5 suppressions name a closed ticket — decide the `li[…]` host      | 01         | yes       | todo   |
 
 The ID order already respects every dependency, so it is the recommended running order.
 
@@ -142,6 +143,12 @@ four import lines, and it collides with nothing else in the table — RD-27's mo
 `libs/shared/src/ui/`. Pull it forward into any short session. It is numbered last only because
 it was added after RD-04 shipped.
 
+**RD-37 must run before RD-30**, despite its number. RD-30 archives `docs/project/backlog/`,
+and five of the paths it would have to rewrite point at `WP-11-markup-fidelity.md` from
+accessibility suppressions that RD-37 either deletes or re-aims. Doing RD-30 first means
+rewriting five paths that are about to change again — and enshrining a promise nobody owns.
+See PLAN.md Phase 5, item 0.
+
 **Two ordering traps the table encodes.** RD-01 must precede RD-30, because RD-01 copies its
 ticket template out of the directory that RD-30 archives. And four tickets edit the same two
 documents in different sections — RD-09 rewrites the submit-idiom teaching, while RD-31 and