Issue:
Bug: fix(bug): drainer fails to deserialize refund status



it seems due to recent changes that the refund status is encoded in snakecase whereas the older drainer working on PascalCase is failing breaking backwards compatibility

Pull request description:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [x] Bugfix
- [ ] New feature
- [ ] Enhancement
- [ ] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
<!-- Describe your changes in detail -->
- Add backwards compatibility aliases on refund status

### Additional Changes

- [ ] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [ ] This PR modifies application configuration/environment variables

<!--
Provide links to the files with corresponding changes.

Following are the paths where you can find config files:
1. `config`
2. `crates/router/src/configs`
3. `loadtest/config`
-->


## Motivation and Context
<!--
Why is this change required? What problem does it solve?
If it fixes an open issue, please link to the issue here.

If you don't have an issue, we'd recommend starting with one first so the PR
can focus on the implementation (unless it is an obvious bug or documentation fix
that will have little conversation).
-->
Currently drainer relies on the serde json representation to parse these results and hence needs a backwards compatible way to parse older & newer formats.

## How did you test it?
<!--
Did you write an integration/unit/API test to verify the code changes?
Or did you test this change manually (provide relevant screenshots)?
-->
- make refunds with kv mode and check the operations tab for their presence

## Checklist
<!-- Put an `x` in the boxes that apply -->

- [ ] I formatted the code `cargo +nightly fmt --all`
- [ ] I addressed lints thrown by `cargo clippy`
- [ ] I reviewed the submitted code
- [ ] I added unit tests for my changes where possible


Testing:

- make refunds with kv mode and check the operations tab for their presence

Patch:
diff --git a/crates/common_enums/src/enums.rs b/crates/common_enums/src/enums.rs
index 36cc0bcb11c..87b436ca922 100644
--- a/crates/common_enums/src/enums.rs
+++ b/crates/common_enums/src/enums.rs
@@ -1574,11 +1574,16 @@ pub enum PaymentType {
 #[strum(serialize_all = "snake_case")]
 #[serde(rename_all = "snake_case")]
 pub enum RefundStatus {
+    #[serde(alias = "Failure")]
     Failure,
+    #[serde(alias = "ManualReview")]
     ManualReview,
     #[default]
+    #[serde(alias = "Pending")]
     Pending,
+    #[serde(alias = "Success")]
     Success,
+    #[serde(alias = "TransactionFailure")]
     TransactionFailure,
 }