fix(appeng): serialize stack to NBTTagCompound to satisfy signal constraints

[hinyb]

Summary

This PR resolves the console warnings by serializing stacks to NBTTagCompound to satisfy signal constraints.
fixes GTNewHorizons/GT-New-Horizons-Modpack#26028

Checklist

• I have tested this PR in DevEnv
• I have tested this PR in Fullpack
• This PR is in compliance with the GTNH AI Policy
• This PR requires another PR in order to merge

[Azusfin]

I'm still quite unsure if this is the right solution, since this seems to make the code be dependent on data card to decode nbt
There's also a way by flatting the stack into the event arguments but that'll also lead to omitting some details of the item stack
So it's one way or another

[hinyb]

I'm still quite unsure if this is the right solution, since this seems to make the code be dependent on data card to decode nbt There's also a way by flatting the stack into the event arguments but that'll also lead to omitting some details of the item stack So it's one way or another

Why would it depend on the data card? I don't think NBTTagCompound compresses itself.

[Azusfin]

ah wait, did i misunderstand what this is supposed to change

[hinyb]

ah wait, did i misunderstand what this is supposed to change

No worries! I made this change simply because the signal needs to be serialized to disk, so I'm using NBTTagCompound just like ItemStack does.

[Azusfin]

LGTM!