Multi-adapter boundary in normalizeDirectoriesData() supports both
communities[] and directories[] upstream schemas. Sync script mirrors
logic and writes canonical format. Preserves directoryCode and features
for future use.
Adds sync-directories.js script that fetches 5chan-directories.json from bitsocialhq/lists and updates the vendored fallback. Runs before generate:assets in prestart and prebuild to ensure the fallback is fresh for every build. Non-fatal: if fetch fails, existing file is kept.
plebeius