Isolates violated messages for further review by the sender
When Nightfall detects a violation, and you have configured it to quarantine the violation,
The content of the message is sent to the #nightfall-content-slack channel.
The original message is replaced with a tombstone message, indicating that the original message is no longer available.
The channel that will receive the alert messages for policy violations from is #nightfall-alerts-slack.
Messages that are quarantined, alerts are sent to the #nightfall-quarantine-slack channel.