| Named SQS (`workorder-shoc-emitter-*`), SHOC secret/KMS/**ResourcePolicy**, API GW, Lambdas, alarms, SES receipt rules | TF-owned (import `aws_secretsmanager_secret_policy.shoc_webhook_hmac` before disposal); remove from CFN via retain-on-delete or deletion_policy before stack delete |
| CDK `Custom::S3BucketNotifications` | **Do not destroy via the CFN delete-handler.** That handler calls empty `PutBucketNotificationConfiguration` and wipes TF-owned `aws_s3_bucket_notification` on the PO/WO email buckets. After Terraform apply owns notifications: orphan/retain the custom resource (or otherwise skip its delete cleanup), then destroy `BucketNotificationsHandler` Lambda/role with CFN. Immediately verify `GetBucketNotificationConfiguration` still lists the inbound Lambda triggers; if cleared, re-apply Terraform before accepting traffic. |
| `BucketNotificationsHandler` Lambda/role (+ handler IAM policy) | Destroy with CFN only after notifications are TF-owned and the custom resource is orphaned/removed without clearing the bucket config |
