[2.3.0] Checkmk Werk 16180 created: Ruleset API: Datamodel changes for Proxy FormSpec

[//]: # (werk v2) # Ruleset API: Datamodel changes for Proxy FormSpec key | value ---------- | --- date | 2024-03-28T13:45:23+00:00 version | 2.3.0b5 class | feature edition | cre component | checks level | 1 compatible | yes This only affects plugin developers. The datamodel for the `Proxy` Formspec is changed. Use the `migrate_to_proxy` migration function to update your stored configurations to the newer datamodel.