chore: fix data designer version

[lipikaramaswamy]

Summary

Small PR to fix data-designer==0.5.7 instead of >= so we do not suffer from untested consequences of upcoming async defaults in data designer (overwhelming our default model set and leading to failures). Before we upgrade, we need to perform the task of default model selection to spread the load across models, not just pin all rewrite steps to gpt-oss-120b which overloads the model on build.

[greptile-apps]

Greptile Summary

This PR tightens the data-designer version constraint from >=0.5.7 to ==0.5.7 in pyproject.toml and regenerates uv.lock accordingly, guarding against untested async-default changes in upcoming data-designer releases that overload the default model set. The lock file's revision field decreased from 3 to 2, suggesting a full regeneration; verify no prior manual or in-flight lock edits were lost.

Confidence Score: 4/5

Safe to merge; the pin is intentional and well-motivated, with only a minor concern about lock file regeneration.

The change is minimal and purposeful — pinning a dependency version. The only P2 concern is the lock file revision going backwards, which could indicate lost intermediate changes. No P0/P1 issues present.

uv.lock — confirm no dependency changes were dropped during full lock file regeneration (revision 3 → 2).

Important Files Changed

Filename	Overview
pyproject.toml	Pins data-designer from >=0.5.7 to ==0.5.7 to prevent unexpected upgrades with breaking async defaults
uv.lock	Lock file updated to reflect pinned data-designer==0.5.7; revision number decremented from 3 to 2, suggesting a full regeneration rather than an in-place update

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[pyproject.toml\ndata-designer>=0.5.7] -->|PR #135| B[pyproject.toml\ndata-designer==0.5.7]
    B --> C{uv lock}
    C --> D[uv.lock pinned\ndata-designer==0.5.7\nrevision=2]
    D --> E[Builds use exactly\nv0.5.7 — no async\ndefault surprises]

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