feat: Introduce a new Go-based test suite runner with supporting scripts and documentation.

README.en.md

@@ -210,11 +210,29 @@ Tool-call leakage is handled in the current implementation:
 - API docs: `API.md` / `API.en.md`
 - Deployment docs: `DEPLOY.md` / `DEPLOY.en.md`
 - Contributing: `CONTRIBUTING.md` / `CONTRIBUTING.en.md`
+- Testsuite guide: `TESTING.md`
 
 ```bash
 go test ./...
 ```
 
+One-command live end-to-end tests (with full request/response logs):
+
+```bash
+./scripts/testsuite/run-live.sh
+```
+
+Or run with explicit flags:
+
+```bash
+go run ./cmd/ds2api-tests \
+  --config config.json \
+  --admin-key admin \
+  --out artifacts/testsuite \
+  --timeout 120 \
+  --retries 2
+```
+
 ## Disclaimer
 
 This project is built through reverse engineering and is provided for learning and research only. Stability is not guaranteed. Do not use it in scenarios that violate terms of service or laws.