* fix(keycloak_realm_key): handle missing config fields for default keys
Keycloak API may not return 'active', 'enabled', or 'algorithm' fields
in the config response for default/auto-generated realm keys. This caused
a KeyError when the module tried to compare these fields during state
detection.
Use .get() with the expected value as default to handle missing fields
gracefully, treating them as unchanged if not present in the API response.
Fixes: #11459
* add PR link to changelog entry per review feedback
