Changes to GET /stats/by-period

api operation id getStatsByPeriod was added

the security scope STATS_READ was added to the endpoint's security scheme ApiKeyAuth

added the non-success response with the status 400

added the non-success response with the status 401

added the non-success response with the status 403

added the non-success response with the status 405

added the non-success response with the status 429

added the non-success response with the status 500