HeatmapTrack after applying hg.divide() is not loading

Hey everyone,
I'm trying to use the `hg.divide` function, and it works when I load different datasets with `hg.remote()`, but not with `hg.cooler()`. I've tried various approaches, but I haven't been able to get it to work. Could maybe someone help me?

```
import higlass as hg

t1 = hg.cooler('../dir/file1.mcool')
t2 = hg.cooler('../dir/file2.mcool')

t3 = hg.divide(t1, t2).opts(
colorRange=["blue", "white"],
valueScaleMin=0.1,
valueScaleMax=10,
)

domain = (2e7, 3e7)
v1 = hg.view(t1, width=4).domain(x=domain)
v2 = hg.view(t2, width=4).domain(x=domain)
v3 = hg.view(t3, width=4).domain(x=domain)

view_lock = hg.lock(v1, v2, v3)

(v1 | v3 | v2).locks(view_lock)

```

Best,
Henrik

Start by reproducing the provided notebook-style example with two hg.cooler inputs and hg.divide, then compare it with the working hg.remote case. Investigate the hg.divide and hg.cooler entry points; done means the resulting HeatmapTrack loads and displays in the locked three-view layout.

Vom Indexierungsmodell aus dem Issue-Text verfasst.