Fresh CI Postgres runs initial-schema without this column (added historically
via scripts); ADD COLUMN IF NOT EXISTS makes the data migration safe on new
and existing envs.
Co-authored-by: Cursor <cursoragent@cursor.com>
Existing is_system_collection rows may carry stale copy; align them with VOCAB.SYSTEM_COLLECTION_SEED_DESCRIPTION so UI matches new signups.
Co-authored-by: Cursor <cursoragent@cursor.com>