ALTER TABLE "proposal_approvers" ADD COLUMN "step_label" text;--> statement-breakpoint
ALTER TABLE "proposals" ADD COLUMN "details" jsonb;--> statement-breakpoint
ALTER TABLE "proposals" ADD COLUMN "decided_at" timestamp with time zone;--> statement-breakpoint
CREATE UNIQUE INDEX "proposal_approvers_uniq" ON "proposal_approvers" USING btree ("proposal_id","approver_id");