EvictionController: Fix potential panic on header access

Use Header.Get() instead of direct array indexing to safely access
X-Openstack-Request-Id header. This prevents panic if the header
is missing or empty.

Author: notandy

internal/controller/eviction_controller.go

@@ -400,7 +400,7 @@ func (r *EvictionReconciler) liveMigrate(ctx context.Context, uuid string, evict
 		return err
 	}
 
-	log.Info("Live migrating server", "server", uuid, "source", eviction.Spec.Hypervisor, "X-Openstack-Request-Id", res.Header["X-Openstack-Request-Id"][0])
+	log.Info("Live migrating server", "server", uuid, "source", eviction.Spec.Hypervisor, "X-Openstack-Request-Id", res.Header.Get("X-Openstack-Request-Id"))
 	return nil
 }
 
@@ -419,7 +419,7 @@ func (r *EvictionReconciler) coldMigrate(ctx context.Context, uuid string, evict
 		return err
 	}
 
-	log.Info("Cold-migrating server", "server", uuid, "source", eviction.Spec.Hypervisor, "X-Openstack-Request-Id", res.Header["X-Openstack-Request-Id"][0])
+	log.Info("Cold-migrating server", "server", uuid, "source", eviction.Spec.Hypervisor, "X-Openstack-Request-Id", res.Header.Get("X-Openstack-Request-Id"))
 	return nil
 }