exports.up = (pgm) => {
  pgm.sql(`
    -- The submitter's intent, per submission, because that is how it is
    -- expressed: one checkbox above the send button, ticked by default.
    --
    -- The worker acts on it rather than the intake route. Removing inline
    -- would make the sender wait, would put a CPU-heavy model run in a path
    -- anyone holding a link can trigger — the surface #227 exists to bound —
    -- and would force a choice, when the sidecar is unreachable, between
    -- failing their submission and silently ignoring what they asked for.
    --
    -- NOT NULL DEFAULT true so a row written before this migration, or by any
    -- path that does not mention the column, behaves like the new default.
    ALTER TABLE item_drafts
      ADD COLUMN IF NOT EXISTS remove_background BOOLEAN NOT NULL DEFAULT true;

    -- Where the photo came from, per image, because that is how it is undone.
    -- Null until a photo has been cut out, so it is also the answer to "can
    -- this be restored?" — one fact in one place rather than a flag that can
    -- disagree with a path.
    --
    -- Nullable and with no default: an existing image has no original other
    -- than itself, and claiming otherwise would offer a Restore that swapped a
    -- photo for a copy of itself.
    ALTER TABLE item_images
      ADD COLUMN IF NOT EXISTS original_image_path TEXT;
  `);
};

exports.down = (pgm) => {
  pgm.sql(`
    ALTER TABLE item_drafts DROP COLUMN IF EXISTS remove_background;
    ALTER TABLE item_images DROP COLUMN IF EXISTS original_image_path;
  `);
};