Capture file size in the database

[manasaV3]

Add fields to the surface the size of the downloadable asset:

• [ ] Annotations (.ndjson, .mrc, .zarr)
• [ ] Tomograms (.mrc, .zarr)
• [ ] Tiltseries (.mrc, .zarr)
• [ ] Frames (cumulative size)
• [ ] Dataset (complete dataset)

Tasks:

• [ ] Update db schema
• [ ] Update import scripts
• [ ] Run import scripts for all datasets
• [ ] Update client
• [ ] Update documentation

[junxini]

@manasaV3 i think this needs to go back to the priority backlog right?