Increase default AI-agent retrieval top-k from 5 to 10

[AshwaniKharwar]

Problem

AI-agent queries currently return only the top 5 results. This can unnecessarily limit retrieval recall.

Proposal

Change the default top-k value for AI-agent queries from 5 to 10.

Rationale

In evaluation, Recall@10 reached 100%, so using 10 results improves recall without needing changes to the query itself.

Acceptance criteria

• AI-agent queries default to returning the top 10 results.
• The limit remains configurable where applicable.
• Relevant tests and documentation reflect the new default.