fix: complete Playwright removal in CI deploy workflow

Drop the leftover Playwright browser install and e2e smoke test from the deployment script, and update the deployment contract tests to cover the verify-deployed-release smoke check instead.

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

@@ -8,7 +8,7 @@ it("uses two test workers and runs smoke checks in the deployment transaction",
 	expect(workflow).not.toContain("\n  e2e:");
 	expect(workflow).toContain("bash scripts/ci-deploy.sh");
 	expect(deploy).toContain(
-		"PLAYWRIGHT_BASE_URL=http://127.0.0.1:3002 pnpm test:e2e",
+		"node scripts/verify-deployed-release.mjs http://127.0.0.1:3002/api/health",
 	);
 });
 it("locks CI and scheduled deployments using the same production lock", () => {