Changes to Start/schedule campaign

the response property campaign/sender_mode became optional for the status 201

the response property campaign/sender_visibility became optional for the status 201

added the optional property cooldown_remaining_ms to the response with the 400 status

added the optional property cooldown_remaining_ms to the response with the 429 status

the campaign/stats/progress response's property format changed from float to double for status 201

the response property campaign/sender/privacy_settings/delivery_receipts/enabled became optional for the status 201

the response property campaign/sender/privacy_settings/read_receipts/enabled became optional for the status 201

the response property campaign/sender/privacy_settings/typing_indicators/enabled became optional for the status 201

the response property campaign/users/items/privacy_settings/delivery_receipts/enabled became optional for the status 201

the response property campaign/users/items/privacy_settings/read_receipts/enabled became optional for the status 201

the response property campaign/users/items/privacy_settings/typing_indicators/enabled became optional for the status 201

added the optional property campaign/sender/devices/items/hardware_id to the response with the 201 status

added the optional property campaign/users/items/devices/items/hardware_id to the response with the 201 status

the response property campaign/channel_template/custom became optional for the status 201

the response property campaign/message_template/attachments became optional for the status 201

the response property campaign/message_template/custom became optional for the status 201

the response property campaign/message_template/poll_id became optional for the status 201

the response property campaign/message_template/searchable became optional for the status 201

added the optional property campaign/sender/bypass_moderation to the response with the 201 status

added the optional property campaign/users/items/bypass_moderation to the response with the 201 status

added the optional property campaign/channel_template/members_template to the response with the 201 status

added the required property campaign/message_template/searchable to the response with the 201 status

added the optional property campaign/sender/privacy_settings/delivery_receipts to the response with the 201 status

added the optional property campaign/users/items/privacy_settings/delivery_receipts to the response with the 201 status

added the required property campaign/sender_visibility to the response with the 201 status

added the optional property campaign/sender/avg_response_time to the response with the 201 status

added the optional property campaign/users/items/avg_response_time to the response with the 201 status

removed the optional property campaign/message_template/attachments/items/latitude from the response with the 201 status

removed the optional property campaign/message_template/attachments/items/longitude from the response with the 201 status

removed the optional property campaign/message_template/attachments/items/stopped_sharing from the response with the 201 status

added the optional property campaign/sender/teams_role to the response with the 201 status

added the optional property campaign/users/items/teams_role to the response with the 201 status

added the required property campaign/show_channels to the response with the 201 status

added the optional property users to the response with the 201 status

added the required property campaign/stats/stats_users_read to the response with the 201 status

added the required property campaign/stats/stats_users_sent to the response with the 201 status

the response property campaign/sender/devices became optional for the status 201

the response property campaign/users/items/devices became optional for the status 201

added the optional property campaign/channel_template/team to the response with the 201 status

added the required property campaign/sender_mode to the response with the 201 status

endpoint added