a red player attacks my scout hero peacefully sleeping in a stable. Here I declare a technical loss for red due to rule violation.

Point 5, clause 1 of the seasonal rules states:
5.1. The so-called "red rush" is prohibited, meaning a player playing as red is not allowed to attack during the first day of the week with growth purchased that day:
b) blue's heroes or guarded mines, if the presence of growth could affect the outcome of the battle or the losses in battle for any of the players.

IMHO an attack on a scout hero is not a serious basis for a technical loss, because the presence of growth could not affect the outcome of the game. Theoretically, there is no difference whether you chase away an enemy scout hero with 7 griffins from the first week's growth or with a full 4-week growth. :) And purely on a human level, it wasn't necessary to impose a technical loss on the opponent for such a reason. But that's up to everyone's conscience... :) ;) :)