[CAI-315] - Evaluation using Ragas

[mdciri]

List of Changes

• evaluation using ragas framework
• update chatbot.py to evaluate a trace and put the output scores on langfuse

Motivation and Context

monitoring the RAG with objective metrics

How Has This Been Tested?

locally

Screenshots (if appropriate):

Types of changes

• Chore (nothing changes by a user perspective)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[changeset-bot]

⚠️ No Changeset found

Latest commit: a16ef46

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[github-actions]

Jira Pull Request Link

This Pull Request refers to the following Jira issue CAI-315

[github-actions]

Branch is not up to date with base branch

@mdciri it seems this Pull Request is not updated with base branch.
Please proceed with a merge or rebase to solve this.

[github-actions]

This PR exceeds the recommended size of 800 lines. Please make sure you are NOT addressing multiple issues with one PR. Note this PR might be rejected due to its size.