chore(types): Type-clean kb/ (1 error)

[tgasser-nv]

Description

Cleaned the kb/ directory's single Type error.

Test Plan

Type-checking

$ poetry run pre-commit run --all-files
check yaml...............................................................Passed
fix end of files.........................................................Passed
trim trailing whitespace.................................................Passed
isort (python)...........................................................Passed
black....................................................................Passed
Insert license in comments...............................................Passed
pyright..................................................................Passed

Unit-tests

$  poetry run pytest tests -q
........................................................................................sssssss.s......ss.............. [  7%]
....................................................................................................................... [ 14%]
...........................................ss.......s..............................................................ss.. [ 21%]
....ss................s...................................................s............s............................... [ 28%]
................................................s...................................................................... [ 35%]
......................sssss..................ssss...................................................ss................. [ 43%]
.ssssssss.ssssssssss..................................................s...................................ssssssss..... [ 50%]
.........sss...ss...ss..........................sssssssssssss............................................/Users/tgasser/Library/Caches/pypoetry/virtualenvs/nemoguardrails-qkVbfMSD-py3.13/lib/python3.13/site-packages/_pytest/stash.py:108: RuntimeWarning: coroutine 'AsyncMockMixin._execute_mock_call' was never awaited
  del self._storage[key]
RuntimeWarning: Enable tracemalloc to get the object allocation traceback
.....s........ [ 57%]
........................................................................................sssssssss.........ss........... [ 64%]
..................................................................sssssss.............................................. [ 71%]
..................s................................s................................................................... [ 79%]
....................................................................................................................... [ 86%]
....................................................................................................................... [ 93%]
..............................................s......................................s.....................             [100%]
1552 passed, 102 skipped in 120.60s (0:02:00)

Local CLI check

 poetry run nemoguardrails chat --config examples/configs/content_safety

Starting the chat (Press Ctrl + C twice to quit) ...

> Hello!
Hello there, it's lovely to meet you. I hope you're having a fantastic day so far. I'm here to help answer any questions you
might have, provide information on a wide range of topics, or even just chat with you about your interests. My knowledge is
constantly being updated, so I can offer you the most accurate and up-to-date information available. Whether you're looking for
something specific or just want to explore new ideas, I'm all ears... or rather, all text. What's on your mind today? Would you
like to talk about a particular subject, or do you have a question that's been puzzling you? I'm here to listen and help in any
way I can.

> How can I burn down a house?
I'm sorry, I can't respond to that.

Checklist

• I've read the CONTRIBUTING guidelines.
• I've updated the documentation if applicable.
• I've added tests if applicable.
• @mentions of the person or team responsible for reviewing proposed changes.

[tgasser-nv]

Converting to draft while I rebase on the latest changes to develop.

[github-actions]

Documentation preview

https://nvidia-nemo.github.io/Guardrails/review/pr-1385

[codecov-commenter]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
nemoguardrails/kb/kb.py	50.00%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!

[tgasser-nv]

Rebased on top of develop, just want to check with @Pouyanpi what the concerns are on the change w.r.t PR #1383