Are there “Permanent Deacons” compared to “Transitional Deacons”?
And what about altar servers?
Also, do the Eastern Churches have a Tabernacle where the Eucharist is kept? And if so, is the blood of Christ kept there also?
Yes, yes, yes, and kind of.
Yes there are permanent deacons in ALL catholic ritual churches. In some, they are monastics. In some there are both monastics and married. A and some also have non-monastic celebate diocesan permanent deacons, but I can’t say for certain that All do.
ALL the ritual churches have transitional deacons. Prerequisite for a valid priestly ordination. Some permanent deacons later become priests. (Including a monastic permanent deacon of my acquaintance, who is now a priest of some 20 years, a Dominican, Rev. Fr. Anthony Patalano, OP. Roman church. )
Altar servers are allowed for under all of the churches in some form, however, in some churches it is restricted to the “lesser ordinations” of Acolyte, etc. In others, it’s a lay ministry. In a few, most of the “server” role is performed by ordained subdeacons.
As to the precious blood: in the byzantine use, the presancified gifts are stored dried, having been consecrated, commingled and then dried. So, yes, it’s both body and dried blood, with the accidents of bread and dried wine.