vantage6-server node accepts non-whitelisted algorithms from malicious server
### Impact
A node does not check if an image is allowed to run if a `parent_id` is set. A malicious party that breaches the server may modify it to set a fake `parent_id` and send a task of a non-whitelisted algorithm. The node will then execute it because the `parent_id` that is set prevents checks from being run. Relevant node code here
https://github.com/vantage6/vantage6/blob/version/4.1.1/vantage6-node/vantage6/node/docker/docker_manager.py#L265-L268
This impacts all servers that are breached by an expert user
### Patches
Fixed in v4.1.2
### Workarounds
None