ci: #3616588 Stop the Drupal CMS job republishing the shared build cache

Closes nothing on its own — a CI follow-up to the #3616588 merge, which left the 1.0.x pipeline red.

Problem

After !29 (merged) merged, all 15 🧪 varbase-e2e suites on 1.0.x fail before a single scenario runs:

Error: @cucumber/pretty-formatter does not export a function/class
    at resolveImplementation (node_modules/@cucumber/cucumber/lib/formatter/resolve_implementation.js:23:15)

The same suites were green on the merge request pipeline for the same tree, and retrying reproduces the failure, so it is not runner variance.

Root cause

📦 (Varbase) Install and 🧩 (Drupal CMS) Install both ran cache: *varbase_cache — the same key educare-build-v2-$CI_COMMIT_REF_SLUG, with the default pull-push policy — in parallel in the same pre-test stage.

Only the Varbase job runs npm install. The Drupal CMS job builds its own cmssite/ codebase and never touches node_modules or testsite/; it merely restores them from the cache and then, on success, uploads them again. Whichever job finishes last wins:

• Varbase job last -> the freshly installed node_modules is published. Test jobs pass.
• Drupal CMS job last -> the stale restored node_modules is published over it. Test jobs pull a tree built before package.json gained its overrides, which resolves @cucumber/cucumber 13.2.1 against the pinned @cucumber/pretty-formatter 1.0.1 — the pair that throws the error above.

The cache key is per ref, which is why the MR ref and 1.0.x behaved differently on identical code.

Verified locally: a fresh install honours the overrides and yields cucumber 12.9.0 + pretty-formatter 1.0.1, where the formatter resolves correctly; forcing the 13.2.1 + 1.0.1 pair reproduces the error verbatim.

Change

Give the Drupal CMS job its own cache key with composer downloads only, so it can no longer republish node_modules/testsite:

.cms_cache: &cms_cache
  key: "educare-cms-v1-$CI_COMMIT_REF_SLUG"
  paths:
    - .cache/composer

One anchor added, one cache: reference changed. No job logic touched.

Note: the currently stored educare-build-v2-1-0-x cache is already poisoned, so the runner caches should be cleared once (Settings -> CI/CD -> Clear runner caches) so the first pipeline after this merge rebuilds node_modules cleanly.

Testing

gitlab-ci-local on the changed file: config parses and the schema validates, 📐 YAML lint PASS (348 YAML files, 0 invalid), 📦 Composer validate PASS.

AI-Generated: Yes

Checkpoints:

• File an issue
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• Automated unit testing coverage
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• UX/UI designer responsibilities
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• Reviewed by human
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• Full testing and approval
• Credit contributors
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• Release notes snippet
• Release