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.

.gitea/README.md

@@ -44,6 +44,8 @@ git.shts.su/<owner>/<имя>:sha-<full-sha>
 
 Имена образов: `evobgp-api`, `evobgp-all`, `evobgp-scheduler`, `evobgp-ingest`, `evobgp-render`, `evobgp-deploy`, `evobgp-node`, `evobgp-web`, `evobgp-web-all`, `evobgp-agent`, `evobgp-bird2`.
 
+**Удалённый спикер** (compose `deploy/compose/docker-compose.remote-speaker.yaml`): `evobgp-bird2`, `evobgp-agent`, `evobgp-node` (fallback profile); Traefik — внешний `traefik:latest`. CI: `scripts/validate-remote-speaker-compose.sh`.
+
 Пример:
 
 ```bash