[BUG] Exponential backoff is broken

Environment

• Platform (select one):
• [ ] Anthropic API
• [x] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: 0.2.56
• Operating System: Linux
• Terminal: irrelevant

Bug Description

In 0.2.56 exponential backoff for throttling with HTTP 429 is broken.
In 0.2.55 and below it is working.

Steps to Reproduce

1. Get throttled with 429

Expected Behavior

Automatic retry with exponential backoff and execution continues.

⎿ API Error (429 Too many tokens, please wait before trying again.) · Retrying in 1 seconds… (attempt 1/10) ⎿ API Error (429 Too many tokens, please wait before trying again.) · Retrying in 1 seconds… (attempt 2/10) ⎿ API Error (429 Too many tokens, please wait before trying again.) · Retrying in 2 seconds… (attempt 3/10) ⎿ API Error (429 Too many tokens, please wait before trying again.) · Retrying in 4 seconds… (attempt 4/10) ...

Actual Behavior

⎿  API Error: 429 Too many tokens, please wait before trying again.

Execution stops.

Additional Context

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