ci: serialize deployments and restore previous release on smoke failure

src/lib/ci-workflow-contract.test.ts

@@ -58,10 +58,10 @@ describe("CI workflow", () => {
 		expect(workflow).toContain('tags: ["v*"]');
 	});
 
-	it("has e2e job that smoke-tests the deployed app", () => {
-		expect(workflow).toContain("e2e:");
-		expect(workflow).toContain("needs: deploy");
-		expect(workflow).toContain("pnpm test:e2e");
-		expect(workflow).toContain("PLAYWRIGHT_BASE_URL");
+	it("smoke-tests the deployed app within the deployment transaction", () => {
+		expect(workflow).toContain("bash scripts/ci-deploy.sh");
+		const deploy = readFileSync("scripts/ci-deploy.sh", "utf8");
+		expect(deploy).toContain("pnpm test:e2e");
+		expect(deploy).toContain("PLAYWRIGHT_BASE_URL");
 	});
 });