feat(evaluators): sao 16858 add evaluator for llm thin

[wrisa]

Summary

• What changed and why.

Scope

• User-facing/API changes:
• Internal changes:
• Out of scope:

Risk and Rollout

• Risk level: low / medium / high
• Rollback plan:

Testing

• Added or updated automated tests
• Ran make check (or explained why not)
• Manually verified behavior

Checklist

• Linked issue/spec (if applicable)
• Updated docs/examples for user-facing changes
• Included any required follow-up tasks

[codecov]

Codecov Report

❌ Patch coverage is 97.64493% with 13 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...ent_control_evaluator_galileo/_shared/evaluator.py	96.07%	8 Missing ⚠️
.../agent_control_evaluator_galileo/_shared/config.py	92.50%	3 Missing ⚠️
.../agent_control_evaluator_galileo/_shared/client.py	99.61%	1 Missing ⚠️
...ks/python/src/agent_control/evaluators/__init__.py	80.00%	1 Missing ⚠️

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