Searching for fact-checks should match claim fields too.

[caiosba]

Description

Now searching for fact-checks can also match the claim fields "description" and "context".

Fixes: CV2-5194.

How has this been tested?

I added a unit test.

Checklist

• I have performed a self-review of my own code
• I have added unit and feature tests, if the PR implements a new feature or otherwise would benefit from additional testing
• I have added regression tests, if the PR fixes a bug
• I have added logging, exception reporting, and custom tracing with any additional information required for debugging
• I considered secure coding practices when writing this code. Any security concerns are noted above.
• I have commented my code in hard-to-understand areas, if any
• I have made needed changes to the README
• My changes generate no new warnings
• If I added a third party module, I included a rationale for doing so and followed our current guidelines

[vasconsaurus]

Looks pretty straightforward to me 🙂