Increase vitest testTimeout to 10s for full-suite reliability

- Prevents deploy-workflow-contract.test.ts timeout in full-suite runs
- Test runs in ~2s individually but hits 5s default under 30s+ import time
- 10s provides sufficient headroom under resource contention

vitest.config.ts

@@ -18,6 +18,7 @@ export default defineConfig({
 		// Modules under test transitively import @/env; skip its strict parse so
 		// unit tests run without a populated .env.
 		env: { SKIP_ENV_VALIDATION: "1" },
+		testTimeout: 10000,
 		exclude: ["e2e/**", "node_modules/**", ".next/**", ".next.prev/**"],
 		coverage: {
 			enabled: true,