Sync timestamp

[anupkashyap]

Which issue(s) does this change fix?

#5267

Why is this change necessary?

This change addresses the request to add timestamp to the the sync file when watching which would make it easier to find out when the last sync was completed

How does it address the issue?

Adds a formatted timestamp in front of the log message

What side effects does this change have?

None

Mandatory Checklist

PRs will only be reviewed after checklist is complete

• Add input/output type hints to new functions/methods
• Write design document if needed (Do I need to write a design document?)
• Write/update unit tests
• Write/update integration tests
• Write/update functional tests if needed
• make pr passes
• make update-reproducible-reqs if dependencies were changed
• Write documentation

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[hnnasit]

Thanks for contributing @anupkashyap, changes LGTM!

[mndeveci]

Thanks for your contribution, looks good to me! @hnnasit there might be some integration tests which validates the output, we might need to update them.