Unstructured IR logs do not have dates rendered

[junhaoliao]

Bug

As shown in the screenshot, the date of the log event is missing from the log viewer:

yscope-log-viewer version

7285859

Environment

Google Chrome: Version 133.0.6943.142 (Official Build) (arm64)

Reproduction steps

1. Launch log viewer demo: https://y-scope.github.io/yscope-log-viewer/?filePath=https://yscope.s3.us-east-2.amazonaws.com/sample-logs/yarn-ubuntu-resourcemanager-ip-172-31-17-135.log.1.clp.zst
2. Observe that the log events do not have the date part rendered.