Event trigger to only fire once per document load

### Description

My end goal is to be able to fire an "interaction" event to a reporting endpoint.
I need this to fire only once per document load (first interaction), as it makes it easier to calculate an interaction rate (interactions / views).

Either a new "interaction" trigger that only fired once, or a "click" trigger with the ability to only fire once, would enable my use-case.

### Alternatives Considered

I tried using "on": "click" but cannot since it fires on every click, not only the first one.
I have not found any other ways it could be achieved.

### Additional Context

_No response_