fix(boojum-cuda): "un-swap" coarse and fine count for powers_data_g_i (…

…#27)

# What ❔

Fixes bug in context creation where `coarse_log_count` and
`fine_log_count` were mistakenly swapped.

## Checklist

<!-- Check your PR fulfills the following items. -->
<!-- For draft PRs check the boxes as you complete them. -->

- [x] PR title corresponds to the body of PR (we generate changelog
entries from PRs).
- [x] Tests for the changes have been added / updated.
- [x] Documentation comments have been added / updated.
- [x] Code has been formatted via `zk fmt` and `zk lint`.

crates/boojum-cuda/src/context.rs

@@ -132,9 +132,9 @@ unsafe fn copy_to_symbols(
         &powers_data_g_i,
         &PowersData::new(
             powers_of_g_i_fine,
-            coarse_log_count,
-            powers_of_g_i_coarse,
             fine_log_count,
+            powers_of_g_i_coarse,
+            coarse_log_count,
         ),
     )?;
     copy_to_symbol(&inv_sizes, &inv_sizes_host)?;