Issue:
Implement `CardsInfoInterface` for `MockDb`

Spin out from #172. Please refer to that issue for more information.

Resolution:
<think>
PR Context:
- Title: feat(router): implement `CardsInfoInterface` for `MockDB`
- Merged: 2023-05-25T07:25:37Z
- Files changed: 2 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 -->

Very simply implement `CardsInfoInterface` for `MockDB`, allowing looking up of card info, the only trait method

### Additional Changes

- [ ] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [ ] This PR 
</think>

To implement this, you'll need to modify:


**Detailed Implementation:**


**Commit 1:** feat(router): implement `CardsInfoInterface` for `MockDB` (#1262)
Files to modify:


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

**crates/router/src/db/cards_info.rs**
  Modify existing code