Corepack is gone from Node 25+, so every `corepack enable` call
fails. pnpm now ships as a system binary (devenv, CI runners and
Docker images install it directly) and auto-downloads the version
pinned in `packageManager` on mismatch.
Scripts, workflows and Dockerfiles call `pnpm` straight away; the
three deploy workflows use a single `pnpm/setup@v2` step; and the
new `scripts/sync-pnpm-version` stamps all 35 `packageManager`
fields from the system pnpm, replacing the `corepack use` sweep.
AI-assisted-by: muse-spark-1.3-contributor
- Remove conditional build from test scripts (frontend, common)
- Remove test:jvm from common package.json (JVM tests via clojure directly)
- Remove test from backend package.json (JVM tests via clojure directly)
- Unify common/scripts/test-quiet.js with frontend's BUILD_STEPS pattern
- Add execution discipline section to mem:testing (no piping, tee to file)
- Add READ mem:testing FIRST directives to module testing docs
AI-assisted-by: deepseek-v4-flash
Add focused common JavaScript test execution with log-level control and a quiet test wrapper matching the frontend workflow.
Update developer docs and testing memories to reflect the common/frontend test split, and document why runner helper extraction is deferred.
Signed-off-by: Codex <codex@openai.com>