Update the join fetching exception metrics

[yuli-han]

Summary

Currently the join fetching exception metrics are not recorded correctly. Metrics.Context(Metrics.Environment.JoinFetching) doesn't include the join name so the exception is not recorded on join level.

The PR changes the behaviors for two types of exceptions:

1. InvalidEntityException is handled on join level, the PR updates the metric context to add join name.
2. MissingKeyException is handled on join part level, the PR updates the metric context to add join name(not group by name).

Why / Goal

Test Plan

Testing the missing key exception:
python3 ~/.local/bin/run.py --mode=fetch --name zipline_test/iceberg_realtime.v0 -k '{"name":null}' -t join --chronon-jar ~/test/chronon-embedded.jar --online-jar ~/test/online-all.jar | tee ~/test/fetch.log

Fetched result:

metrics:

• Added Unit Tests
• Covered by existing CI
• Integration tested

Checklist

• Documentation update

Reviewers

@hzding621 @pengyu-hou

[pengyu-hou]

Thank you!