scat files give only coarsest freq, e.g. yearly in most cases, while aeroval says daily

[heikoklein]

Describe the bug
Please provide a clear and concise description of what the bug is.

• Pyaerocom version: 0.21

To Reproduce
Steps to reproduce the behavior:

1. see https://aeroval.met.no/pages/overall/?project=emep&experiment=2024-reporting&station=ALL&2024-reporting=2024-reporting&observation=EBAS-h&parameter=vmro3&frequency=daily&tab=heatmap&region=Cyprus
2. Check Cyprus (one station)

Expected behavior
daily scatterplot should show daily values, but shows only one yearly point (only one point written to file under /scat)

Screenshots

Additional context
The data in /scat seems to use the coarsest resolution. According to @AugustinMortier this was a precaution to avoid too many datapoints, e.g. for all stations/hourly data. Needs to be discussed what the coarsest resolution should be. It should at least correspond to the information shown in the screenshot. On the other hand, new aeroval versions have a preview mode to avoid overloading the system.

This issue needs discussion between aeroval/pyaerocom what the best solution would be.