add callback for getContainerIp (#2851)

* add callback for getContainerIp

* register callback before retrieving info

* version bump; only use backports for linux

core/startos/src/registry/package/signer.rs

@@ -74,6 +74,7 @@ pub async fn add_package_signer(
             Ok(())
         })
         .await
+        .result
 }
 
 pub async fn remove_package_signer(
@@ -100,6 +101,7 @@ pub async fn remove_package_signer(
             Ok(())
         })
         .await
+        .result
 }
 
 #[derive(Debug, Deserialize, Serialize, Parser, TS)]