test(server): ajoute tests fonctionnels sync et fixtures versionnees (#187)

Fixe .gitignore pour exclure .build-home/ et .pub-cache-local/ des
environnements locaux de build (bruit non versionne). Documente le
checklist d'integration serveur et met a jour le README en consequence.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

server/docs/integration-checklist.md

@@ -53,6 +53,13 @@ should be HTTPS through the reverse proxy.
 curl http://localhost:8080/health
 ```
 
+- For an Android emulator client, confirm the APK was built with the default
+  `http://10.0.2.2:8090` URL or with an explicit server URL:
+
+```bash
+flutter build apk --debug --dart-define=GAMETIME_API_BASE_URL=http://192.168.1.75:8090
+```
+
 - Register a user with `POST /auth/register`.
 - Login with `POST /auth/login` and store the returned bearer token.
 - Call a protected endpoint without a token and confirm `401`.