-- add "slug" column to "workspace_apps" table
ALTER TABLE "workspace_apps" ADD COLUMN "slug" text DEFAULT '';

-- copy the "name" column for each workspace app to the "slug" column
UPDATE "workspace_apps" SET "slug" = "name";

-- make "slug" column not nullable and remove default
ALTER TABLE "workspace_apps" ALTER COLUMN "slug" SET NOT NULL;
ALTER TABLE "workspace_apps" ALTER COLUMN "slug" DROP DEFAULT;

-- add unique index on "slug" column
ALTER TABLE "workspace_apps" ADD CONSTRAINT "workspace_apps_agent_id_slug_idx" UNIQUE ("agent_id", "slug");