feat(core): diesel models, domain models and db interface changes for callback_mapper table (#6571)

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

crates/storage_impl/src/callback_mapper.rs

@@ -0,0 +1,28 @@
+use diesel_models::callback_mapper::CallbackMapper as DieselCallbackMapper;
+use hyperswitch_domain_models::callback_mapper::CallbackMapper;
+
+use crate::DataModelExt;
+
+impl DataModelExt for CallbackMapper {
+    type StorageModel = DieselCallbackMapper;
+
+    fn to_storage_model(self) -> Self::StorageModel {
+        DieselCallbackMapper {
+            id: self.id,
+            type_: self.type_,
+            data: self.data,
+            created_at: self.created_at,
+            last_modified_at: self.last_modified_at,
+        }
+    }
+
+    fn from_storage_model(storage_model: Self::StorageModel) -> Self {
+        Self {
+            id: storage_model.id,
+            type_: storage_model.type_,
+            data: storage_model.data,
+            created_at: storage_model.created_at,
+            last_modified_at: storage_model.last_modified_at,
+        }
+    }
+}