fix(translator): make Gemini tool call IDs deterministic and robustly match responses

- Replaced random tool-call ID generation with deterministic `call_<sha256>` IDs for stable, repeatable Gemini→OpenAI conversion.
- Switched response matching from global ordering to per-function-name queues, so same-name and interleaved tool calls are paired correctly, while honoring explicit IDs (`id`/`call_id`/`callId`) when provided.
- Added deterministic fallback IDs for orphan tool responses when no matching pending call exists.

Closes: #4939