It should be set the same way we currently have SWH_SENTRY_DSN.
`SWH_MAIN_PACKAGE` names must be dotted package names (`swh.indexer`, `swh.storage`, etc.)
Choosing `SWH_SENTRY_ENVIRONMENT` names are left to the implementer of this task, but I suggest `production` and `staging`, as they match both our terminology and Sentry's.
https://docs.sentry.io/workflow/releases/?platform=python
https://docs.sentry.io/enriching-error-data/environments/?platform=python