Issue: [FEATURE] feat(router): verify service for applepay merchant registration v2

### Feature Description

verify service for applepay merchant registration in v2

### Possible Implementation

Add POST /v2/verify/apple-pay/{merchant_id} endpoint for verify domains with Apple

### Have you spent some time checking if this feature request has been raised before?

- [x] I checked and didn't find a similar issue

### Have you read the Contributing Guidelines?

- [x] I have read the [Contributing Guidelines](https://github.com/juspay/hyperswitch/blob/main/docs/CONTRIBUTING.md)

### Are you willing to submit a PR?

Yes, I am willing to submit a PR!

Resolution: <think>
PR Context:
- Title: feat(router): verify service for applepay merchant registration v2
- Merged: 2025-08-22T13:36:37Z
- Files changed: 5 files
- Commits: 1 commits

Implementation approach:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [X] New feature
- [ ] Enhancement
- [ ] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
<!-- Describe your changes in detail -->
Add Apple Pay merchant registration and verified domains retrieval for v2

### Additional Changes

- [X] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [ ] This PR modifies application configuration/enviro
</think>

To implement this, you'll need to modify:


**Detailed Implementation:**


**Commit 1:** feat(router): verify service for applepay merchant registration v2 (#8999)
Files to modify:


**crates/router/src/core/verification.rs**
  Modify existing code

**crates/router/src/core/verification/utils.rs**
  Modify existing code

**crates/router/src/lib.rs**
  Modify existing code

**crates/router/src/routes/app.rs**
  Add:
    - function: pub::server
    - impl: impl Verify

**crates/router/src/routes/verification.rs**
  Add:
    - function: pub::apple_pay_merchant_registration