How to update hook config based on custom resource changes

[vladimirfx]

My small operator uses CRD for configuration [1]. To implement efficient operation, the operator should listen for changes in resources (like leases and services), which selectors are read from the operator's own custom resources.
How can I instruct the Shell Operator to reconfigure hooks on custom resource change?

A workaround in the form of ConfigMap may be used but it is an absolutely different story in the sense of scalable cluster configuration where distinct teams manage their resources (Hetzner FIP in my case).

[1] https://github.com/cit-consulting/hetzner-failoverip-controller/tree/main