fix: return nick name for each card while listing saved cards (#1391)

Co-authored-by: Narayan Bhat <48803246+Narayanbhat166@users.noreply.github.com>

crates/api_models/src/payments.rs

@@ -489,6 +489,10 @@ pub struct Card {
     /// The card network for the card
     #[schema(value_type = Option<CardNetwork>, example = "Visa")]
     pub card_network: Option<api_enums::CardNetwork>,
+
+    /// The card holder's nick name
+    #[schema(value_type = Option<String>, example = "John Test")]
+    pub nick_name: Option<Secret<String>>,
 }
 
 #[derive(Eq, PartialEq, Clone, Debug, serde::Deserialize, serde::Serialize, ToSchema)]