fix(cd): create 'automated' label before back-merge PR to avoid failure

[pszymkowiak]

Problem

The post-release back-merge-develop job in cd.yml runs gh pr create … --label automated, but the automated label does not exist in this repo. gh pr create validates labels before creating the PR, so the step fails with:

could not add label: 'automated' not found

This happened on every release: the back-merge branch was pushed but no PR was opened, so develop silently fell behind on release-version metadata (manifest + CHANGELOG + Cargo.toml). Observed and recovered manually on icm-v0.10.54 (back-merge completed via #298).

Fix

Create the automated label idempotently right before gh pr create:

gh label create automated --color ededed --description "Automated PR (back-merge / release tooling)" 2>/dev/null || true

• Keeps the automated label semantics (useful for filtering tooling PRs).
• Removes the failure mode without masking real gh pr create errors.

Test

YAML validated. Functional validation happens on the next release: the back-merge PR should open automatically with the automated label and no failure.

[pszymkowiak]

Verified: the automated label is currently absent on this repo (gh label list — confirmed), so gh pr create --label "automated" in the back-merge step (cd.yml:217) was indeed failing and aborting the back-merge PR. The fix (gh label create automated … 2>/dev/null || true) is idempotent and placed right before the pr create that needs it. Patched cd.yml parses as valid YAML. Only touches cd.yml (no conflict with recent develop). LGTM — ready to merge.