Sub-Issue 4: Implement IPCC Retrieval Capability

[aleenaharoldpeter]

Description

The chatbot should be able to retrieve relevant IPCC content when queried.

This task focuses on validating that the retrieval layer can successfully return IPCC passages when relevant information exists.

Tasks

• Execute retrieval queries against indexed IPCC content.
• Test climate-related questions expected to match IPCC reports.
• Evaluate retrieval quality.
• Adjust retrieval configuration if required.

Acceptance Criteria

• Relevant IPCC content is returned for appropriate queries.
• Retrieval quality is acceptable for testing scenarios.