E2E: trial for more workers

[phyllis-sy-wu]

WHY are these changes introduced?

Evaluate whether increasing E2E parallel workers from 5 (#7309) to 10 improves CI run time enough to justify the added resource pressure on our 4 vCPU CI runners.

WHAT is this pull request doing?

Bumps E2E worker count to 10 for benchmarking against the 5-worker baseline in #7309.

Benchmark Results:
(under stable conditions, very few teardown failures or flaky retries)

	5 workers (#7309)	10 workers (#7343)	Savings
Local	8.8 min	6.3 min	2.5 min (28%)
CI	11m 43s	8m 49s	2m 54s (25%)

Conclusion: Sticking with 5 workers. ~3 min CI savings is nice but not worth the tradeoff:

• More parallel store creation/teardown = more surface area for flaky cleanup
• 4 vCPU CI runner is already tight with 5 workers; 10 doubles contention
• Once teardown is more robust, bumping workers is a one-line config change

CI runner specs: ubuntu-latest = 4 vCPUs, 16 GB RAM (GitHub docs).

How to test your changes?

Compare CI run times between this PR and #7309.

Post-release steps

N/A — trial branch, not intended to merge.

Checklist

• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've considered possible documentation changes
• I've considered analytics changes to measure impact
• The change is user-facing, so I've added a changelog entry with pnpm changeset add

[phyllis-sy-wu]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• E2E: trial for more workers #7343 👈 (View in Graphite)
• E2E: parallel workers #7309 : 2 other dependent PRs (#7349 , #7350 )
• E2E: per-test store isolation with automatic teardown #7279
• E2E: temporary time limit bump #7282
• E2E: improve error context in assertions #7281
• E2E: one-time global auth before test start #7272
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.

[github-actions]

Differences in type declarations

We detected differences in the type declarations generated by Typescript for this branch compared to the baseline ('main' branch). Please, review them to ensure they are backward-compatible. Here are some important things to keep in mind:

• Some seemingly private modules might be re-exported through public modules.
• If the branch is behind main you might see odd diffs, rebase main into this branch.

New type declarations

We found no new type declarations in this PR

Existing type declarations

packages/cli-kit/dist/public/node/upgrade.d.ts

@@ -1,5 +1,3 @@
-import { getAutoUpgradeEnabled, setAutoUpgradeEnabled } from '../../private/node/conf-store.js';
-export { getAutoUpgradeEnabled, setAutoUpgradeEnabled };
 /**
  * Utility function for generating an install command for the user to run
  * to install an updated version of Shopify CLI.