[Bug]: Extract Regex Node RangeError

### What happened?

When I use (?=\n\[\d{4}\]) in the Extract Regex Node i obtain a RangeError: Invalid array length
It seems that the Extract Regex Node does not work with the regex lookahed "(?=...)"

### What was the expected functionality?

Rivet did not work as expected!

### Describe your environment

MacOS Sonoma 14.4.1, node.js v21.4.0, Rivet v1.7.10

### Relevant log output

_No response_

### Relevant screenshots

_No response_

### Code of Conduct

- [X] I agree to follow this project's Code of Conduct

Start with the Extract Regex Node and reproduce the reported RangeError using the lookahead pattern (?=\n\[\d{4}\]) in the stated Rivet and Node.js environment. Trace where the regex result is converted into an array and verify completion by confirming the node handles this pattern without throwing Invalid array length.

Written by the indexing model from the issue text.