Export datasets to JSONL for fine-tuning

[jack-devhub]

Added the ability to export evaluation datasets in JSONL format from the Judgment platform.

Changes:

• ✨ Implement export_jsonl() method in EvalDatasetClient with streaming support
• 🔗 Add new API endpoint constant JUDGMENT_DATASETS_EXPORT_JSONL_API_URL
• ✅ Create comprehensive e2e test for JSONL export functionality
• 📦 Add JSON serialization/deserialization dependencies in test suite

Testing Performed:

1. End-to-End Validation

   • Creates test dataset with examples and ground truths
   • Verifies successful API response (200 status)
   • Validates JSONL format integrity
   • Checks field presence based on record type (examples vs ground truths)
   • Ensures correct example/ground truth counts

2. Error Handling

   • 404 handling for non-existent datasets
   • HTTP error propagation
   • Authentication validation

3. Integration

   • Verified compatibility with existing dataset operations

Improvements:

• Requires JUDGMENT_DATASETS_EXPORT_JSONL_API_URL environment variable update
• Maintains existing security patterns with API key authentication
• Uses chunked streaming response for memory efficiency with large datasets

[alanzhang25]

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[alanzhang25]

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