Prototype Rancour passive limited to 1 stack

[HelpSeeker]

Right now it's only possible to have one Rancour stack.

Here's a simple sim to illustrate the issue.

Example sim

jean char lvl=90/90 cons=0 talent=9,9,9;
jean add weapon="prototyperancour" refine=5 lvl=90/90;

target lvl=100 resist=.1 hp=1000000000;
energy every interval=480,720 amount=1;

active jean;

print(.jean.stats.atk%);

for let i = 0; i < 5; i = i + 1 {
  jean attack:1;
  print(.jean.stats.atk%);
}

Running it will lead to the following debug output:

I assume the issue is the following line, which resets the stacks if the passive is active rather than when it first gets activated. https://github.com/genshinsim/gcsim/blob/e7023fb909edb67c33c25df8324186d48f21e55f/internal/weapons/sword/prototype/prototype.go#L58

Changing it to !char.StatModIsActive(buffKey) seems to solve the problem.