Setting `security.is_managed true` over the air results in NO_CHANNEL for PKI admin

[ndoo]

Using > meshtastic --dest !abcd1234 --set security.is_managed true to enable managed mode over the air results in NO_CHANNEL errors and losing PKI admin access.

Using local serial does not cause this.

I think this is due to not being able to read out the existing security configs over the air, causing a blank security section to get written back to the node (other than security.is_managed), resulting in the admin keys getting wiped out.

[ndoo]

Very annoyingly, it also means that disabling managed mode over the air also causes the security keys to get wiped halfway through the transaction, causing it to fail.

> meshtastic --dest !abcd1234 --set security.is_managed false --host [redacted]
Connected to radio
Requesting current config from remote node (this can take a while).

Set security.is_managed to false
Writing modified preferences to device
Writing security configuration to device
Waiting for an acknowledgment from remote node (this could take a while)
Aborting due to: Timed out waiting for an acknowledgment

For now it seems like using CLI to set/unset managed mode with PKI admin is not possible.