-- Metadaten-Beileger (.md) pro Upload-Quelle steuerbar statt global.
ALTER TABLE settings ADD COLUMN IF NOT EXISTS picdrop_metadata_sidecar bool NOT NULL DEFAULT false;
ALTER TABLE settings ADD COLUMN IF NOT EXISTS nas_metadata_sidecar     bool NOT NULL DEFAULT false;
ALTER TABLE delivery_targets ADD COLUMN IF NOT EXISTS metadata_sidecar  bool NOT NULL DEFAULT false;
