Remove truncation_mode from DPO #5372

Bugbot Review

Bugbot Analysis Progress (4m 37s elapsed)

✅ Gathered PR context (2s)
✅ Completed bug detection (4m 28s)
✅ Posted analysis results (8s)

Final Result: Bugbot completed review and found 1 potential issue. 1 previously reported issue remain unresolved.

Request ID: serverGenReqId_5ed4a09a-d4e2-456e-9b61-09f88bd25ecb

Cursor Bugbot has reviewed your changes and found 1 potential issue.

There are 2 total unresolved issues (including 1 from previous review).

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