Update 0.5.5.64

Dedicated callback listener and field-page translations

Added an optional callback-only Docker Compose service for Internet/DMZ deployments.
The callback service exposes only the software callback POST route and callback health route; the AssetManager UI is not available on that service.
Added CALLBACK_PORT to .env.example with default host port 8090.
The optional listener is started with docker compose --profile callback up -d.
The existing callback base URL continues to define the public HTTP/HTTPS FQDN used by job scripts.
Translated the central field-management page and field editor, including the previously hard-coded Add field button and data-type labels.