# What this PR does
- add new columns `gcom_org_contract_type`,
`gcom_org_irm_sku_subscription_start_date`, and
`gcom_org_oldest_admin_with_billing_privileges_user_id` to
`user_management_organization` table + `is_restricted` column to
`alerts_alertgroup` table
- emit two new Django signals
- `org_sync_signal` at the end of the
`engine/apps/user_management/sync.py::sync_organization` method
- `alert_group_created_signal` when a new Alert Group is created
## Checklist
- [ ] Tests updated (N/A)
- [ ] Documentation added (N/A)
- [x] `CHANGELOG.md` updated
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Co-authored-by: Rares Mardare <rares.mardare@grafana.com>
