Fix Sector selection in snap ingester

[magik6k]

Should address all concerns from #104

Definitely fixes sector selection logic.

[magik6k]

The last commit implements the fix also done in filecoin-project/lotus#12342; We'll also need that for PoRep side, opened an issue for it - #138

[LexLuthr]

We missed an important point. If a sector is extended using sptool then our DB would not know about it. Thus our sector selection is never going to be correct. We need a IAmBored job which updated the sector expiration every few hours in the DB. Only for sector_meta table.
Or we can check expiration of each sector online and then do the selection.
IAmBored seems a cleaner approach.

[magik6k]

We need a IAmBored job which updated the sector expiration every few hours in the DB

We have that: https://github.com/filecoin-project/curio/blob/main/tasks/metadata/task_sector_expirations.go

[LexLuthr]

We need a IAmBored job which updated the sector expiration every few hours in the DB

We have that: https://github.com/filecoin-project/curio/blob/main/tasks/metadata/task_sector_expirations.go

I don't know how I missed that. 🤦

[LexLuthr]

90 days grace period is a f05 market deal thing and not part of power/miner actor.