Make all API's available across tenants.

Currently most API calls only work within the default tenant. As a developer this limits the ability to work with other projects.

For all api calls add /customerid/xxxxx-xx-xx-x-x/ to the path to reference another tenant.

If tenant id is not supplied then default to the users default tenant.

example: When listing workspaces, be able to specify a tenant id so see only the workspaces/models I have access to in those tenants.