User Access Brands Bundle Profile

JSON FHIR Bundle (type: `collection`) of Organizations and Endpoints that is hosted at a stable, publicly available, publicly disclosed location.

For background and context, see [User Access Brands Overview](brands.html#brand-bundle-profile).

Bundle Entries include:

• User Access Endpoint Profile resources.
• User Access Brand (Organization) resources. Vendors SHALL publish at least a "primary brand" for each endpoint and SHOULD support the publication of a more detailed Brand hierarchy.

Brand Bundles SHALL populate `Bundle.timestamp` to advertise the timestamp of the last change to the contents. In addition, Brand Bundles SHOULD populate `Bundle.entry.resource.meta.lastUpdated` with a more detailed timestamp if the system tracks updates per Resource.