Add `extraHosts` option to `runContainer` and `runContainerWithStreaming` so arbitrary `HostConfig.ExtraHosts` entries can be passed when spawning containers.
Expose `getOwnExtraHosts()` from `host-path.ts` and forward the cached entries into scanner and self-updater containers, ensuring custom host aliases (e.g. internal registry hostnames) are available inside those sidecars without additional user configuration.
The dockhand-updater image ships Docker CLI 29.2.1 (API 1.53), which
fails on hosts running older Docker daemons (e.g. Synology DSM with
Docker 24.0.2 / API 1.43). Every docker command in update.sh returns
"client version 1.53 is too new".
Query the daemon's API version via /version and pass it as
DOCKER_API_VERSION to the updater container env. If the env var is
already set on the main container, forward that instead.
Fixes#759
jarek