Changes to List observation-only pre-game side cohorts

added the new freshness_ceiling_unsatisfied enum value to the error/reason response property for the response status 400

added the new freshness_ceiling_unsatisfied enum value to the error/reason response property for the response status 401

added the new freshness_ceiling_unsatisfied enum value to the error/reason response property for the response status 402

added the new freshness_ceiling_unsatisfied enum value to the error/reason response property for the response status 403

added the new freshness_ceiling_unsatisfied enum value to the error/reason response property for the response status 408

added the new freshness_ceiling_unsatisfied enum value to the error/reason response property for the response status 423

added the new freshness_ceiling_unsatisfied enum value to the error/reason response property for the response status 429

added the new freshness_ceiling_unsatisfied enum value to the error/reason response property for the response status 500

added the new freshness_ceiling_unsatisfied enum value to the error/reason response property for the response status 503

added the optional property error/freshness to the response with the 400 status

added the optional property error/freshness to the response with the 401 status

added the optional property error/freshness to the response with the 402 status

added the optional property error/freshness to the response with the 403 status

added the optional property error/freshness to the response with the 408 status

added the optional property error/freshness to the response with the 423 status

added the optional property error/freshness to the response with the 429 status

added the optional property error/freshness to the response with the 500 status

added the optional property error/freshness to the response with the 503 status

endpoint added