Adds EMAIL_FORWARDING as a new MessageChannelType and ConnectedAccountProvider,
along with the S3-polling inbound email driver skeleton (storage, parser,
import service, driver module) and supporting config variables. Provider
switches across auth, refresh tokens, email aliases, and outbound routing
are updated to handle the new enum value.
This is a work-in-progress commit; the poll cron job, list-fetch cron
filter, channel creation mutation, frontend UI and tests are not yet
implemented.
https://claude.ai/code/session_01SM4RuPAL9p8CTmt3xvKgp3
Claude
48e658df57