• Merge pull request #637 from kaitranntt/kai/fix/634-iflow-406
• chore(maintainability): refresh baseline metrics
• fix(iflow): replace placeholder model defaults to prevent 406
• Merge pull request #627 from kaitranntt/kai/feat/624-share-context
• fix(auth): harden shared-context isolation and config safety
• fix(auth): close shared-context isolation edge cases
• fix(auth): harden shared-context isolation edge cases