chore: add PNPM catalog lockfile sanity check workaround (#6631)

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: louis-bompart <[email protected]>

Author: Copilot

.github/actions/setup/action.yml

@@ -38,6 +38,12 @@ runs:
         node-version-file: '.nvmrc'
         registry-url: 'https://registry.npmjs.org'
         cache: 'pnpm'
+    # Workaround for PNPM catalog bug: ensure lockfile is sane before installing
+    # https://github.com/pnpm/pnpm/issues/9112
+    # If this fails, run `pnpm dedupe` locally and commit the updated lockfile
+    - name: Check lockfile deduplication
+      run: pnpm dedupe --check
+      shell: bash
     - run: pnpm install --frozen-lockfile --prefer-offline
       shell: bash
 #endregion