chore: script to set journey.customizable on existing templates#8816

jianwei1 wants to merge 2 commits intojianweichong/nes-1400-backend-auto-detect-journeycustomizable-via-recalculationJesusFilm/core:jianweichong/nes-1400-backend-auto-detect-journeycustomizable-via-recalculationfrom

jianweichong/nes-1402-migration-backfill-journeycustomizable-for-existingJesusFilm/core:jianweichong/nes-1402-migration-backfill-journeycustomizable-for-existingCopy head branch name to clipboard