Important

Rewrites observation CSV exports by introducing a streaming mechanism with model data enrichment, enhancing performance and maintainability.

• Behavior:
  • Introduces getObservationStream in observation-stream.ts for streaming observation data with model enrichment.
  • Updates handleBatchExportJob and handleBatchActionJob to use getObservationStream for observations.
  • Increases totalObservations from 1000 to 10000 in seed-clickhouse.ts.
• Refactoring:
  • Moves model enrichment logic to enrichObservationWithModelData in observations_converters.ts.
  • Refactors tests in batchExport.test.ts to use getObservationStream.
• Misc:
  • Adds clickhouseSearchCondition export in queries/index.ts.
  • Minor logging improvements in observation-stream.ts.

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