The catalog feature (approved ASR-0014) was lost during the GitHub history
rewrite: the merge commit on main is empty and the code only survived on the
old gitea-history branches (no merge base with main). Port catalog/* and the
oo catalog CLI verbatim; drop the library-only applications package whose
Sync() created the 'Write application'/'Apply application'/'Send CV' CRM
task spam (23k+ tasks deleted 2026-08-18).
