Update pyproject-fmt to 2.15.2

[adamtheturtle]

Update pyproject-fmt to 2.15.2.

---

Note

Low Risk
Config-only reordering with identical coverage settings; low risk aside from potential CI differences if tooling relies on exact TOML key order.

Overview
Updates pyproject.toml formatting consistent with pyproject-fmt changes by reordering the [tool.coverage] report.* keys (exclude_also/fail_under) to come after the run.* settings, without changing their values.

No runtime code changes; this only affects configuration file ordering/formatting.

^{Written by Cursor Bugbot for commit ef88946. This will update automatically on new commits. Configure here.}