fix(ha_cluster): inject switch client for better testability

brocade/src/lib.rs

@@ -162,7 +162,7 @@ pub async fn init(
 }
 
 #[async_trait]
-pub trait BrocadeClient {
+pub trait BrocadeClient: std::fmt::Debug {
     /// Retrieves the operating system and version details from the connected Brocade switch.
     ///
     /// This is typically the first call made after establishing a connection to determine