feat: add telemetry error capture to xAI provider

[daniel-lxs]

Summary

Add telemetry error capture to the xAI provider, following the same pattern established in PR #10073 for OpenRouter.

Changes

• Import TelemetryService from @roo-code/telemetry
• Import ApiProviderError from @roo-code/types
• In both createMessage() and completePrompt() catch blocks, capture exceptions to telemetry before re-throwing

Pattern Used

try {
  stream = await this.client.chat.completions.create(requestOptions)
} catch (error) {
  const errorMessage = error instanceof Error ? error.message : String(error)
  const apiError = new ApiProviderError(errorMessage, this.providerName, modelId, "createMessage")
  TelemetryService.instance.captureException(apiError)
  throw handleOpenAIError(error, this.providerName)
}

Tests

Added 4 new tests in xai.spec.ts:

• captures telemetry when createMessage throws an exception
• captures telemetry when completePrompt throws an exception
• captures telemetry with correct model ID when using a specific model
• captures telemetry and still re-throws the error

Related

• Follows pattern from PR Capture more of OpenRouter's provider specific error details #10073
• Part of effort to add telemetry error capture to all providers

---

Important

Add telemetry error capture to xAI provider's createMessage and completePrompt methods, with tests to verify functionality.

• Behavior:
  • In xai.ts, createMessage() and completePrompt() now capture exceptions to telemetry using TelemetryService before re-throwing.
  • Follows error capture pattern from PR Capture more of OpenRouter's provider specific error details #10073.
• Imports:
  • Import TelemetryService from @roo-code/telemetry.
  • Import ApiProviderError from @roo-code/types.
• Tests:
  • Add 4 tests in xai.spec.ts to verify telemetry capture in createMessage and completePrompt.
  • Tests ensure correct model ID is captured and errors are re-thrown.

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[roomote]

Rooviewer   See task on Roo Cloud

Review complete. No issues found.

The implementation correctly follows the established telemetry error capture pattern from OpenRouter, with proper use of ApiProviderError and TelemetryService. Tests provide comprehensive coverage for both createMessage and completePrompt error scenarios.

_{Mention @roomote in a comment to request specific changes to this pull request or fix all unresolved issues.}

[daniel-lxs]

Closing - changes will be added to PR #10059 instead