chore(): final fixes before deadline

- added images of notification feature working
- added seed data script
- race condition fix for notifications worker
- small improvements

README.md

@@ -158,8 +158,30 @@ Reproducible k6 profile for `POST /api/v1/decide`:
 - runner: [infrastructure/k6/run-decide.sh](./infrastructure/k6/run-decide.sh)
 - guide: [infrastructure/k6/README.md](./infrastructure/k6/README.md)
 
+## Demo data seed (HTTP)
+
+One-command API seed for demo datasets:
+
+- script: [infrastructure/http/seed-demo-data.sh](./infrastructure/http/seed-demo-data.sh)
+- runbook section: [RUNBOOK.md](./RUNBOOK.md#35-seed-демо-данных-через-http-api)
+
+Example:
+```bash
+BACKEND_BASE_URL='http://127.0.0.1' \
+TG_BOT_TOKEN='<your_bot_token>' \
+TG_CHAT_ID='<your_chat_id>' \
+./infrastructure/http/seed-demo-data.sh
+```
+
+SMTP can be enabled with `SMTP_ENABLED=true` and SMTP env settings (see `RUNBOOK.md`).
+
 ## Selected extra features
 
 - Notifications
+
+
+![Mail](./assets/images/email_notifications.png)
+![Telegram](./assets/images/telegram_notifications.png)
+
 - Learnings Library
 - Domain Conflicts