Write log files to indicate output/restarat/etc files have been fully written

[JessicaMeixner-NOAA]

Is your feature request related to a problem? Please describe.
An issue can arise in operational workflows if you use a file before it is fully written. This feature will add an optiotion to write a log file of some sort to easily check that files are fully written.

Describe the solution you'd like

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
This is related to NOAA-EMC/global-workflow#1248 and NOAA-EMC/global-workflow#935

[ukmo-ccbunney]

I like this proposal. We do similar things with our UM model with empty *.done files...

[JessicaMeixner-NOAA]

@ukmo-ccbunney let me know exactly what your files need to look like, we can build in the flexibility to support multiple styles hopefully. I think for us the request will be something like log.${component}.f${fhr} where component would be ww3 or maybe ww3.pnt or ww3.${grd}.grd or something similar. Are you able to write one empty file for all the different types of output or do you need one for each specific type of output?

[ukmo-ccbunney]

THanks @JessicaMeixner-NOAA .
I don't have a strong requirement for this at the moment, but I can imagine it might be useful in our future coupled systems where we might want to start processing outputs when they are available. I'll keep an eye on this one thanks.