ALTER TABLE "tess_checkpoints" DROP CONSTRAINT "tess_checkpoints_checkpoint_id_unique";--> statement-breakpoint
ALTER TABLE "tess_checkpoints" DROP CONSTRAINT "tess_checkpoints_pkey";--> statement-breakpoint
ALTER TABLE "tess_checkpoints" ADD COLUMN "id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL;--> statement-breakpoint
CREATE UNIQUE INDEX "tess_checkpoints_session_idempotency_idx" ON "tess_checkpoints" USING btree ("session_id","checkpoint_id");--> statement-breakpoint
CREATE INDEX "tess_checkpoints_session_epoch_idx" ON "tess_checkpoints" USING btree ("session_id","compaction_epoch");