Daily data onboarding cap feature

[LexLuthr]

Allow a config parameter to specify how much data can be safely sealed by SPs in 24 hours. Allow option in dashboard to track the usage and allow option for SPs to override for the day if their sealing pipeline can somehow support extra data.

The default value would be 0 (unlimited). We should use GiB as default value rather than KiB as sealing capacities are large.