fix(test): raise bootCrmDb beforeAll timeout on slideshow suites

CI runners hit Jest's default 5s `beforeAll` timeout on
slideshowPublic.test.js's bootCrmDb call (~5.4s observed vs ~2s local —
runner-to-runner I/O variance, not a regression). Same hook shape on
slideshowAdmin.test.js is one slow runner away from the same failure.
Raise both to 30s so this stops blocking unrelated PRs branched off beta.

Adjacent to #654 — not strictly part of that fix but the only blocker
between #656 and a green CI right now.

backend/__tests__/routes/slideshowPublic.test.js

@@ -67,6 +67,11 @@ async function insertEvent(db, over = {}) {
 describe('public Live Slideshow routes', () => {
   let db; let cleanup; let app;
 
+  // bootCrmDb runs the full migration set against a fresh SQLite file, which
+  // takes <2s locally but has been observed to exceed Jest's default 5s
+  // `beforeAll` timeout on slower GitHub Actions runners (~5.4s — runner-to-
+  // runner I/O variance). Raise the hook timeout so this doesn't intermittently
+  // block PRs on CI; doesn't affect happy-path local runs.
   beforeAll(async () => {
     ({ db, cleanup } = await bootCrmDb());
     await seedMinimal(db);
@@ -81,7 +86,7 @@ describe('public Live Slideshow routes', () => {
     app.use((err, req, res, next) => {
       res.status(err.statusCode || err.status || 500).json({ error: err.message, code: err.code });
     });
-  });
+  }, 30000);
 
   afterAll(async () => { await cleanup(); });