The code changes include adding the `Channels` field to the `Account` and `Contact` models in the `crm` and `sfgate` packages. This field is used to store the marketing channels for the respective entities.
The code changes include adding the `AppExchange` field to the `Account` and `Company` models in the `sfgate` and `plex` packages. This field is used to store the Salesforce AppExchange URL.