feat(webhook): Add is_delivered filter to list initial attempts endpoint (#7344)

Co-authored-by: hyperswitch-bot[bot] <148525504+hyperswitch-bot[bot]@users.noreply.github.com>

crates/openapi/src/routes/webhook_events.rs

@@ -45,6 +45,11 @@
             Query,
             description = "Only include Events associated with the Profile identified by the specified Profile ID."
         ),
+        (
+            "is_delivered" = Option<bool>,
+            Query,
+            description = "Only include Events which are ultimately delivered to the merchant."
+        ),
     ),
     responses(
         (status = 200, description = "List of Events retrieved successfully", body = TotalEventsResponse),