Add option 'hidden' for LL procedures
We need to add a flag which will mark some auctions as hidden. This is required to remove from public access auctions which contain information about possible missile targets
- the flag could be set by DevOps, not by marketplace
- the flag could be assigned only to auctions in terminal state
- if some auction has such flag - it should not appear in search
- if someone try to access auction information by ID - API should return specific error "This auction is temporary hidden due to security reasons"