Merge pull request #19098 from overleaf/jpa-graceful-shutdown-tests

[server-ce] add test for graceful shutdown

GitOrigin-RevId: 5e72e0073169009d2e3ece5a79cbd62051f6ad5b

server-ce/test/helpers/hostAdminClient.ts

@@ -76,3 +76,10 @@ export async function runScript({
     }),
   })
 }
+
+export async function getRedisKeys() {
+  const { stdout } = await fetchJSON(`${hostAdminUrl}/redis/keys`, {
+    method: 'GET',
+  })
+  return stdout.split('\n')
+}