net-mgmt/netbox: Update to 4.6.8

Changelog:

Performance Improvements:

• Avoid N+1 queries when resolving generic relations (e.g. assigned objects) via the GraphQL API
• Improve performance when provisioning new custom fields
• Omit implicit pagination when prefetching to-one relations via the GraphQL API
• Improve caching logic when retrieving custom fields via get_for_model()

Bug Fixes:

• Clear a device's stale rack assignment when changing its site
• Enforce object permissions on custom script write operations via the REST API
• Avoid re-executing the LDAP configuration file on every permission check
• Prevent the deletion of a tenant group from creating duplicate tenant names or slugs
• Fix cable path tracing for paths which originate from a circuit termination and traverse only pass-through ports
• Validate that a webhook's payload URL is a valid URL or Jinja2 template when saving
• Allow a null value for base_choices when creating a custom field choice set via the REST API
• Ensure deterministic ordering of duplicate IP addresses to avoid repeating an object across paginated REST API results
• Honor a custom script's notifications_default setting when the script is run from an event rule
• Reference the appropriate component template types on the GraphQL type for inventory item templates
• Improve the contrast of unselected radio buttons and checkboxes in dark mode
• Fix support for the DISTINCT filter on nested GraphQL list fields
• Sanitize the error message rendered when an exception occurs in "CustomLinkColumn:

https://github.com/netbox-community/netbox/releases/tag/v4.6.8

MFH: 2026Q3