This is Minuet by J.Krieger
If I look at the 6-7-8 bars, there is the following chord progression: E - E(7) - Am
With a trill in the 7th bar. I feel like the 6 bar does a kind of "teasing" in a tonal sense i.e from the dominant E you want to go straight to the tonic but the trill in the 7th prolongs the tension.
Is my analysis correct? and is there a name for this "structure"?