Changes to Get alert notifications

removed the optional property items/channelType from the response with the 200 status (media type: text/plain)

removed the optional property items/channelType from the response with the 200 status (media type: application/json)

removed the optional property items/channelType from the response with the 200 status (media type: text/json)

added the optional property items/messageStatusErrorCode to the response with the 200 status (media type: text/plain)

added the optional property items/messageStatusErrorCode to the response with the 200 status (media type: application/json)

added the optional property items/messageStatusErrorCode to the response with the 200 status (media type: text/json)

added the optional property items/notificationChannelType to the response with the 200 status (media type: text/plain)

added the optional property items/notificationChannelType to the response with the 200 status (media type: application/json)

added the optional property items/notificationChannelType to the response with the 200 status (media type: text/json)

the response property code became required for the status 400 (media type: text/plain)

the response property code became required for the status 400 (media type: application/json)

the response property code became required for the status 400 (media type: text/json)

the response property code became required for the status 404 (media type: text/plain)

the response property code became required for the status 404 (media type: application/json)

the response property code became required for the status 404 (media type: text/json)

the response property code became required for the status 500 (media type: text/plain)

the response property code became required for the status 500 (media type: application/json)

the response property code became required for the status 500 (media type: text/json)

added the required property errors/items/code to the response with the 400 status (media type: text/plain)

added the required property errors/items/code to the response with the 400 status (media type: application/json)

added the required property errors/items/code to the response with the 400 status (media type: text/json)

added the required property errors/items/code to the response with the 404 status (media type: text/plain)

added the required property errors/items/code to the response with the 404 status (media type: application/json)

added the required property errors/items/code to the response with the 404 status (media type: text/json)

added the required property errors/items/code to the response with the 500 status (media type: text/plain)

added the required property errors/items/code to the response with the 500 status (media type: application/json)

added the required property errors/items/code to the response with the 500 status (media type: text/json)