Stability Patch — Brand Kit Editor Fixes

🔧 Stability Patch

This patch resolves three issues reported in the Brand Kit editor following the April 6 release.

What''s Fixed

• Industry hierarchy persistence — Industry, Subindustry, and Sector selections now persist correctly across navigation.
• Brand Story save error — Saving storytelling content no longer fails with a missing-column error.
• List input crash — Tag/list editors no longer trigger a blank screen on undefined values.

Behind the Scenes

• Added a missing storytelling_elements column on brand_kit_core.
• Unified the industry save path across brand_kits.industry_details and brand_kit_core.industry_classification_id, with a backfill for existing records.
• Hardened the shared ListInputCard against undefined values.

No action required — fixes are live and existing brand kits have been backfilled automatically.