openclaw - 💡(How to fix) Fix pr-release: suggest and confirm shared release version

What to build

Add the shared version step after repo selection and before draft PR creation. Version discovery should inspect selected repos, suggest a patch bump, normalize operator input, and lock the version once draft PR creation begins.

Acceptance criteria

• Version discovery checks latest GitHub release tag, falls back to latest git tag, extracts X.Y.Z, selects the highest version, and suggests a patch bump.
• Operator input accepts 1.4.3 and v1.4.3 and stores version=1.4.3, tag=v1.4.3, PR/release titles.
• The operator must confirm or edit the suggested version before draft PR creation.
• Version cannot change after draft PR creation starts.
• Continue rejects --version when it differs from saved workflow.version.
• Tests cover tag extraction, patch bump, normalization, and immutability guards.

Blocked by

• pr-release: render Lark scan result UI and repo selection actions