refactor(opencode): simplify retry error matching (#40694)

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Type of change

• Bug fix
• New feature
• Refactor / code improvement
• Documentation

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Summary by CodeRabbit

• Bug Fixes
  • Improved retry handling for rate-limited and overloaded service responses.
  • Added recognition for additional temporary service errors, including too many requests, exhausted resources, and unavailable services.
  • Preserved the original error details when reporting rate-limit failures.
• Tests
  • Expanded coverage for serialized, nested, and provider-specific retry error messages.

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Review failed

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

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Run ID: 2ca83a82-8b61-4a54-a4a5-0bd80e93046d

📥 Commits

Reviewing files that changed from the base of the PR and between d546173 and f929f8f.

📒 Files selected for processing (2)

• packages/opencode/src/session/retry.ts
• packages/opencode/test/session/retry.test.ts

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📝 Walkthrough

Walkthrough

The retry classifier now recognizes additional rate-limit and provider-overload messages. Tests cover serialized, provider, and nested error payloads.

Changes

Retry classification

Layer / File(s)	Summary
Retry detection and validation packages/opencode/src/session/retry.ts, packages/opencode/test/session/retry.test.ts	The classifier matches additional lowercase rate-limit and overload patterns. Tests cover serialized too_many_requests, provider resource_exhausted, and nested rate_limit_exceeded messages.

Estimated code review effort: 2 (Simple) | ~10 minutes

✨ Finishing Touches 💡 1

🛠️ Fix failing CI checks 💡

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• Commit on current branch

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DeepSource Code Review

We reviewed changes in d546173...f929f8f on this pull request. Below is the summary for the review, and you can see the individual issues we found as inline review comments.

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