feat/repo-update-settings
dev
- Repo settings: platform dropdown (Joomla/Dolibarr/Both) + require key - Releases page buttons change based on platform setting - Update feed enforces require-key (empty response without valid key) - key_plain column stores full key for copy functionality - DB migrations v337 (key_plain) + v338 (platform, require_key) Ref #239 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>