I want to run an a/b test where 50% of free users get defaulted to auto
cost efficient, and other 50% to auto open weights.
## Tests
- 50% of the time when i open the app with a different WARP_DATA_DIR i
get the expected flip/flopping
- my default gets persisted throughout signup
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Co-authored-by: Oz <oz-agent@warp.dev>
