feat(remote-speakers): enhance remote speaker management and API integration

- Added support for remote speaker configuration in the README and documentation.
- Implemented a new endpoint for retrieving the bundle signing public key.
- Updated the `evobgp-agent` to include a `serve` command for Panel→Node sync API.
- Enhanced CI workflow to validate remote speaker compose files.
- Introduced new fields in the API and UI for managing speaker metadata, including dispatch status and sync status.
- Improved error handling and response formatting in speaker-related API endpoints.
- Updated documentation to reflect changes in remote speaker functionality and usage guidelines.

docs/README.md

@@ -20,6 +20,7 @@
 | [api.md](api.md) | REST: префикс `/v1`, публичные маршруты, ссылки на OpenAPI |
 | [router-lists-ui-integration.md](router-lists-ui-integration.md) | Интеграция `router-lists-ui` с EvoBGP API (`DOMAINS/IP_RANGES/AS_PREFIXES/communities`) |
 | [access.md](access.md) | Выдача доступа: API-ключи, роли, нода, CORS |
+| [remote-speakers.md](remote-speakers.md) | Удалённые BGP-реплики: Traefik, agent sync, compose |
 | [releasing.md](releasing.md) | Автоматические релизы, Conventional Commits, CI |
 | [openapi.yaml](openapi.yaml) | Источник правды по контракту API |
 | [OPENAPI-GITEA.md](OPENAPI-GITEA.md) | Как открыть HTML-документацию API (в т.ч. из Gitea) |