Api Forget Host

Permanently remove a host from the dashboard.

• Closes the active session if connected (agent will reconnect — this is a soft revoke, not a hard one)
• Deletes the persisted metadata (host_meta in Redis)
• Deletes the label if any (host_label in Redis)

The host will reappear if the agent reconnects with a still-valid identity_token. To prevent that, the user needs to uninstall the agent on the host (which deletes /etc/sentinelx/identity.json).

This is documented in the UI: "Forget host" with a clear explanation that it's only meaningful after uninstalling the agent.