quit saving evaluation result as file

[yuki-mt]

Motivation

dashboard saves evaluation result to db (result column of evaluation_result table),
so not need to save as file

Goal

• quit saving evaluation result as file
• refer db entry to get evaluation result

Implementation

• quit saving evaluation result as file in rekcurd-python
• change gRPC protocol spec
  • after merging [WIP] Renew proto grpc-proto#18 , remove EvaluationMetrics from EvaluationResultResponse
• refer only db entry to get evaluation result in dashboard

[keigohtr]

@yuki-mt
Quitting saving evaluation result as file need to be considered. I think saving them to DB is not good compared with saving them to file.

[keigohtr]

We need roadmap for this.

• 1. Use DB and save json string which includes precison/recall/fvalue
• 2. Change DB schema to store precision/recall/fvalue separately

And we need additional functionalities.

• Visualize ROC curve
• Visualize multi-class classification results
• Visualize other metic (e.g. BLEU score)