fix: Include the AI Judge Config key with tracked metrics

[jsonbailey]

Tracked internally as SDK-1554

---

Note

Propagates AI config key throughout configs and evaluation flow, adds judgeConfigKey to JudgeResponse, and tracks judge metrics with the config key.

• Tracking & Metrics:
  • Add trackJudgeResponse(response: JudgeResponse) to LDAIConfigTracker/LDAIConfigTrackerImpl to track eval scores with judgeConfigKey.
  • TrackedChat now uses tracker.trackJudgeResponse instead of trackEvalScores after successful judge evaluations.
• Judge:
  • Judge.evaluate/evaluateMessages now include judgeConfigKey in the returned JudgeResponse (success and error paths).
• Config Propagation:
  • Introduce required key on LDAIConfig and include it in all produced configs.
  • Update LDAIConfigUtils to accept key in fromFlagValue, to*Config, _toBaseConfig, and createDisabledConfig, embedding key in configs.
  • LDAIClientImpl passes key into LDAIConfigUtils and returns disabled configs via createDisabledConfig(key, mode) on mode mismatch.
• Types:
  • Extend JudgeResponse with optional judgeConfigKey.
• Tests:
  • Update tests to expect key on returned configs and judgeConfigKey in judge results; minor expectation formatting adjustments.

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