CREATE TABLE storage_webhook_events (
  event_id text PRIMARY KEY,
  library_id uuid NOT NULL,
  event_type text NOT NULL,
  paths jsonb NOT NULL,
  task_ids jsonb NOT NULL DEFAULT '[]'::jsonb,
  state text NOT NULL CHECK (state IN ('processing','accepted','failed')),
  error_code text NOT NULL DEFAULT '',
  received_at timestamptz NOT NULL DEFAULT now(),
  completed_at timestamptz
);

CREATE INDEX storage_webhook_events_received_idx ON storage_webhook_events(received_at DESC);