improve logs

[kuraisle]

Is this the right issue type?

• Yes, I'm planning work for this project team.

Summary

The logs for lettuce aren't very helpful.

The LLM logs should store a lot more by default.
OpenTelemetry has examples of GenAI logs

For each generation we should at least log:

• operation name
• model name
• temperature
• messages

Some of this is reported from the Llama.cpp meta, but the prompt should be included

For database searches, the search parameters should be logged, like:

• search term
• search parameters
• query type

Acceptance Criteria

• LLM operations log the specified information
• Database searches log the specified information

Tasks

• Unit tests.
• Documentation.

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