[FEATURE] Choose a different model for compaction

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Auto compaction takes a long time, and consumes a lot of tokens, when using Opus.

Proposed Solution

Have a setting to switch automatically to a lower model before running auto compaction, and automatically switch back to the higher model to continue work.

Alternative Solutions

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Priority

Medium - Would be very helpful

Feature Category

Configuration and settings

Use Case Example

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Additional Context

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