Some remarks:

In Dal_attestation_repr.Accountability I left the notion of "available slot", because I think it's at a higher level (not a single endorser attesting, but a group of endorsers). Not very sure of myself...
in bin_sc_rollup_node (in particular in Dal_slots_tracker, but probably more generally in all the SC/DAL interactions?) the terminology seems to be "confirmed slot" instead of "attested slot". I haven't changed it, because it's somehow out of scope for this MR, and I'm not sure it's worth it. I could look at this in more detail if needed.

Checklist

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[n/a] Provide automatic testing (see the testing guide).
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Edited Nov 10, 2022 by Eugen Zalinescu

DAL: rename availability to attestation