refactor(api): drop apiPostList, which no capped list reads

Every capped route is read with GET, so the POST reader had no caller
and failed the dead-code gate. The list-cap guard now binds a capped
route to apiGetList alone, which is the reader that exists.

src/lib/api/api-fetch.ts

@@ -231,19 +231,6 @@ export async function apiGetList<T = unknown>(
   return { data, cap: readListCap(meta) };
 }
 
-/** POST variant of {@link apiGetList}, for a list read with a body. */
-export async function apiPostList<T = unknown>(
-  path: string,
-  body?: unknown,
-  init?: RequestInit,
-): Promise<{ data: T; cap: ListCap | null }> {
-  const { data, meta } = await apiFetchEnvelope<T>(
-    path,
-    withDefaultIdempotencyKey(withJsonBody("POST", body, init)),
-  );
-  return { data, cap: readListCap(meta) };
-}
-
 /** GET — resolves with the unwrapped `data` payload. */
 export function apiGet<T = unknown>(
   path: string,

src/lib/api/list-cap.ts

@@ -18,7 +18,7 @@
  * reads `meta` decodes it unchanged. `truncated` is exact: true only when a
  * row past the limit exists. The OpenAPI side is `listEnvelope` in
  * `src/lib/openapi/routes/shared.ts`. A client reads it through `apiGetList`
- * / `apiPostList` (`src/lib/api/api-fetch.ts`) and shows it with
+ * (`src/lib/api/api-fetch.ts`) and shows it with
  * `ListCapNotice`; `src/__tests__/list-cap-reader-guard.test.ts` binds every
  * capped route to such a reader.
  */