Description

Fixes the the AbortError2 which appears when streaming fim.

This was happening due to GeneratorReuseManager. It was mostly happening during initial autocomplete requests and backspace or prefix mismatch.

resolves CON-3730

closes #7246

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• [] The relevant tests, if any, have been updated or created

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Summary by cubic

Fixes AbortError2 during FIM streaming so aborted autocomplete requests are treated as cancels, not errors, preventing spurious failures on initial requests and backspace/prefix mismatches. Resolves CON-3730; closes #7246.

• Bug Fixes
  • Updated BaseLLM to log success only when no error; aborts now detected via error.name includes "AbortError" and logged as cancel, otherwise as error.
  • Prevents GeneratorReuseManager-triggered aborts from surfacing as errors during streaming.