Mobilizon.Service.Notifier.Email.send_anonymous_activity

Called by:

• Mobilizon.Service.Workers.LegacyNotifierBuilder.notify_participants (L139)
• Mobilizon.Service.Workers.LegacyNotifierBuilder.notify_participant (L158)
• Mobilizon.Service.Workers.LegacyNotifierBuilder.notify_anonymous_participants (L175)