Fix v1.5→v1.7 keystore migration: wrap symmetric-key in key-type container#1382

Copilot wants to merge 2 commits intomainkernelkit/infix:mainfrom

copilot/review-migration-scripts-v15-to-v17kernelkit/infix:copilot/review-migration-scripts-v15-to-v17Copy head branch name to clipboard