✨ feat: add support for UUID in campaign ID lookup

[abdullai-t]

Summary / Highlights

This PR enhances the campaign-supported language lookup functionality by allowing queries using either the campaign ID or the campaign slug. This improvement ensures that the campaign frontend can retrieve the list of supported languages using the campaign slug, which is the available identifier

Details (Give details about what this PR accomplishes, include any screenshots etc)

Testing Steps (Provide details on how your changes can be tested)

run make test

Requirements (place an x in each [ ])

• [x] I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• [x] I've tested my changes manually.
• [x] I've added unit tests to my PR.

Transparency (Project board)

• [x] I've given my PR a meaningful title.
• [x] I linked this PR to the relevant issue.
• [ ] I moved the linked issue from the "Sprint backlog" to "In progress" when I started this.
• [ ] I moved the linked issue to "QA Verification" now that it is ready to merge.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 95.74468% with 4 lines in your changes missing coverage. Please review.

Project coverage is 56.06%. Comparing base (366cba8) to head (327196f). Report is 3 commits behind head on main.

Files	Patch %	Lines
src/api/store/supported_language.py	69.23%	4 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1156 +/- ## ========================================== + Coverage 55.74% 56.06% +0.31% ========================================== Files 461 462 +1 Lines 33886 33963 +77 ========================================== + Hits 18890 19041 +151 + Misses 14996 14922 -74 ```

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