Changes to GET /api/support/users/:user_pk/errors

added the optional property items/user_agent_extension_full_version to the response with the 200 status (media type: application/json; version=1.0)

added the optional property items/user_agent_extension_full_version to the response with the 200 status (media type: application/vnd.pixiebrix.api+json; version=1.0)

added the optional property items/user_agent_extension_version to the response with the 200 status (media type: application/json; version=1.0)

added the optional property items/user_agent_extension_version to the response with the 200 status (media type: application/vnd.pixiebrix.api+json; version=1.0)