fix(types): change BuilderTradeResponse.builder from Address to ApiKey

[skyc1e]

Summary

• Change BuilderTradeResponse.builder type from Address to ApiKey (UUID)
• The /builder/trades API returns a UUID for the builder field (e.g. 019b618b-4a91-7dd9-a4c9-aadfbcbd5b95), not an Ethereum address
• ApiKey is already used in the same struct for the owner field, so this aligns with existing patterns
• Updated test to use a realistic UUID payload

Note

This is a focused fix for #294 only. PR #297 addresses the same issue but bundles additional scope (#293) and has stalled with unresolved review feedback.

Breaking change: builder field type changes from Address to ApiKey (Uuid). The previous type caused deserialization failures against the real API, so no working code should be affected.

Closes #294

Test plan

• cargo test --test clob builder_trades passes with UUID in mock payload
• Verify deserialization against real /builder/trades endpoint

---

Note

Medium Risk
Breaking type change: BuilderTradeResponse.builder is now an ApiKey (Uuid) instead of an Ethereum Address, which could impact downstream consumers compiling against this SDK. Scope is small and aligns deserialization with the actual /builder/trades payload, reducing runtime failures.

Overview
Fixes /builder/trades deserialization by changing BuilderTradeResponse.builder from Address to ApiKey (Uuid), matching the API’s UUID value for the builder field.

Updates the builder_trades test fixture and expected BuilderTradeResponse construction to use a realistic UUID string instead of an address.

^{Reviewed by Cursor Bugbot for commit c78ae04. Bugbot is set up for automated code reviews on this repo. Configure here.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.54%. Comparing base (77264a4) to head (c78ae04).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #322   +/-   ##
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  Coverage   85.54%   85.54%           
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  Files          32       32           
  Lines        5167     5167           
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  Hits         4420     4420           
  Misses        747      747           

Flag	Coverage Δ
rust	85.54% <ø> (ø)

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