feat(router): add requeue support for payments and fix duplicate entry error in process tracker for requeued payments (#1567)

crates/api_models/src/enums.rs

@@ -973,3 +973,23 @@ pub struct UnresolvedResponseReason {
     /// A message to merchant to give hint on next action he/she should do to resolve
     pub message: String,
 }
+
+#[derive(
+    Debug,
+    serde::Deserialize,
+    serde::Serialize,
+    strum::Display,
+    strum::EnumString,
+    Clone,
+    PartialEq,
+    Eq,
+    ToSchema,
+)]
+#[serde(rename_all = "snake_case")]
+#[strum(serialize_all = "snake_case")]
+pub enum RetryAction {
+    /// Payment can be retried from the client side until the payment is successful or payment expires or the attempts(configured by the merchant) for payment are exhausted
+    ManualRetry,
+    /// Denotes that the payment is requeued
+    Requeue,
+}