fix: use timestamp for sim log file name

[mmsqe]

colon not allowed on MacOS

Description

Closes: #XXXX

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Summary by CodeRabbit

• Bug Fixes
  • Improved log file naming by using milliseconds since Unix epoch for more precise timestamps.

[coderabbitai]

Walkthrough

Walkthrough

The recent update involves modifying the method of generating log file names in our logging system. Instead of using a traditional formatted timestamp, the file names are now created using milliseconds since the Unix epoch. This change enhances the uniqueness and traceability of log files.

Changes

File	Change Summary
.../log.go	Updated the createLogFile function to generate log file names using milliseconds since Unix epoch instead of a formatted timestamp.

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Recent Review Details

Configuration used: .coderabbit.yml

Commits

Files that changed from the base of the PR and between 13cf11a and e2b5886.

Files selected for processing (1)

• x/simulation/log.go (1 hunks)

Additional Context Used

Path-based Instructions (1)

x/simulation/log.go (1)

Pattern **/*.go: Review the Golang code for conformity with the Uber Golang style guide, highlighting any deviations.

Additional comments not posted (2)

x/simulation/log.go (2)

52-52: Use a more descriptive log message.

Consider enhancing the clarity of the log message by specifying that the logs are being written to a file, e.g., "Writing logs to %s".

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52-52: Consider more graceful error handling in createLogFile.

Using panic for error handling in a logging function could be too aggressive and might terminate the application unexpectedly. Consider logging the error and returning nil, or handling the error more gracefully.

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