-- Generic provenance/rerun-identity token for a transactionally imported profile.
--
-- Set by the generic profile-import path (services::import). A NULL value means
-- the profile was created by normal gameplay / dev seeding, not an import, and
-- MUST NOT be silently clobbered by an import targeting the same game. A
-- matching token on a re-run is an idempotent no-op; a differing token against
-- an already-imported game fails until an explicit update mode exists.
--
-- Core never interprets the token's structure; the importer adapter chooses it.
ALTER TABLE profiles ADD COLUMN import_fingerprint TEXT;