feat(process_tracker): make long standing payments failed (#2380)

Co-authored-by: Arun Raj M <jarnura47@gmail.com>

crates/scheduler/src/utils.rs

@@ -298,6 +298,7 @@ pub fn get_schedule_time(
         None => mapping.default_mapping,
     };
 
+    // For first try, get the `start_after` time
     if retry_count == 0 {
         Some(mapping.start_after)
     } else {
@@ -328,6 +329,7 @@ pub fn get_pm_schedule_time(
     }
 }
 
+/// Get the delay based on the retry count
 fn get_delay<'a>(
     retry_count: i32,
     mut array: impl Iterator<Item = (&'a i32, &'a i32)>,