feat: send email notifications for missed messages

- New cron job in cluster
- Handle presence and other concerns
- Toggle in app to disable email notifications
- Handles other edge cases such as cooldown period
- Simple html email with simple message

Closes #117

go/internal/network/service.go

@@ -26,6 +26,8 @@ type Service interface {
 	RemoveMember(ctx context.Context, networkID, humanId string) error
 	ListForHuman(ctx context.Context, humanId string) ([]*Network, error)
 	IsMember(ctx context.Context, networkID, humanId string) (bool, error)
+	// ListAll returns all networks with their members
+	ListAll(ctx context.Context) ([]*Network, error)
 
 	// Invitations (email-based, for users who haven't registered yet)
 	InviteByEmail(ctx context.Context, networkID string, emails []string) error
@@ -116,6 +118,10 @@ func (s *serviceImpl) IsMember(ctx context.Context, networkID, humanId string) (
 	return s.repo.isMember(ctx, networkID, humanId)
 }
 
+func (s *serviceImpl) ListAll(ctx context.Context) ([]*Network, error) {
+	return s.repo.listAll(ctx)
+}
+
 // Invitation methods
 
 func (s *serviceImpl) InviteByEmail(ctx context.Context, networkID string, emails []string) error {