Jigsaw failure

**ISIS version(s) affected**: 8.3.0 and 9.0.0

I have what I believe is a legit ISIS control network for Mars with two cameras and a stereo convergence angle of 9.3 degrees. It gets read in by jigsaw, and it runs very well as:

`jigsaw fromlist=run/list.txt update=no twist=yes radius=yes maxits=3 cnet=run/run-cnet.net onet=run/run-jigsaw.net file_prefix=run/run
`
Yet, as soon as I increase the number of iterations from 3 to 4 (maxits=4), I get the error:
```

aborting...**USER ERROR** Unable to bundle adjust network [run/run-cnet.net].
**PROGRAMMER ERROR** Could not solve bundle adjust.
**PROGRAMMER ERROR** Negative distances are not supported, the value [-193725241.51332 meters] cannot be stored in the Distance class.
(isis9.0.0)
```

Why would that be? I got this with both Mars (MOC) and Europa (JunoCam) data.

Here are the interest point matches, and they look good:

The most similar issue is https://github.com/DOI-USGS/ISIS3/issues/4111, but that doesn't help figure out what is going on.

Note: The control network is created with ASP's bundle_adjust, but it uses the ISIS API for how to set up and save the measurements, control points, their sigma, etc.

I tested this with ISIS 8.3.0 and ISIS 9.0.0.

Self-contained testcase reproducing the problem, having all inputs, outputs, and the command to run, with a readme, is attached.

Note1: It runs just fine with twist=yes radius=no, or with twist=no radius=yes. Only when these are both set to yes it fails.

Note2: This still fails if adding:

`POINT_RADIUS_SIGMA=10000000
`

but it works with:

`POINT_RADIUS_SIGMA=1000000
`

All this suggests the control network is likely legit, but the solver goes wild.

[jigsaw_bug.tar.gz](https://github.com/user-attachments/files/20471137/jigsaw_bug.tar.gz)

Start with the attached jigsaw_bug.tar.gz README and reproduce the command using the provided inputs. Compare runs with twist and radius enabled separately and together, including the POINT_RADIUS_SIGMA values; done means the combined configuration completes without the negative-distance error.

Written by the indexing model from the issue text.