/edit1
I poked around in Altana a little more and realized, that it actually shows the corresponding .dat file for each animation. Not sure if this is news to anyone or if this helps us get any closer to our goal. I don't know how the .dat files are accessed by the code/database so I'm not sure if knowing which .dat stores the animation is actually relevant. I've made a few screenshots just in case it is actually relevant.
Dat location:

There are 15 different Jump .dat files. The last few might be related to Super Jump, since the character is in the air for quite some time. I guess High Jump must be somewhere in the middle then.

Not sure what this list does. The first one displays purple color when the weapons impacts. The second one emits green light on impact. I'm guessing one is a regular hit while the other one is a critical hit. Either that or some armor/weapons have a special Jump effect that changes the color. This wasn't implemented when I was still playing the retail version so you might be able to shed more light on this.

I'm really hoping this information can help us out.
/edit2
I played around with the @animation GM command but the .dat numbers just froze my character in place and after a few commands my server crashed. Maybe there is a way to find extract the animation ID from the .dat files...
/edit3
Opened the .dat file that was called by Altana Viewer in a hex editor but besides a few mentions of "jump" "hits" and "jpX" (X being a number between 0 and 5) it was a whole lot of nonsensical gibberish.
At the end there were a few numbers: 3072, 3047, 7087, 7085 and 7086
Not sure if this means anything (probably not... >_>)