fix(tests): raise jest timeouts to the 120s convention (stable) (#902)

Stable backport combining #860 (never reached stable) and #900:

- jest.config.js gains testTimeout: 120000 — stable still ran on Jest's
  5s default for anything unpinned, while its migration chain (134 core
  migrations via backports) is nearly as long as beta's.
- All 19 suite-level jest.setTimeout(30000/60000) pins raised to 120s;
  local pins override the config default (#860's rationale).
- All 15 hook-ARGUMENT timeout pins on migration-booting beforeAll
  hooks raised to 120s (#900's rationale — the 3.97.0-beta.0 release PR
  failed on exactly this class on the beta side).

Untouched: the three suites whose pinned hooks don't run migrations
(webhookDelivery, imageProcessor.storage, storageBackend) and
publicQuotes' 30s pin on the rate-limit lockout test.

No test logic changed.

Co-authored-by: Paul Nothaft <[email protected]>

backend/__tests__/routes/slideshowPublic.test.js

@@ -67,11 +67,10 @@ 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.
+  // bootCrmDb runs the full migration set against a fresh SQLite file and the
+  // chain keeps growing via backports. Hook-argument timeouts OVERRIDE the
+  // 120s jest.config default (same trap as the jest.setTimeout pins) — keep
+  // this at 120000, matching the config.
   beforeAll(async () => {
     ({ db, cleanup } = await bootCrmDb());
     await seedMinimal(db);
@@ -86,7 +85,7 @@ 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);
+  }, 120000);
 
   afterAll(async () => { await cleanup(); });