Use native pytest TOML configuration

Remove `ini_options.` prefix from pytest configuration keys under
`[tool.pytest]`, using the native TOML configuration format supported
since pytest 9.0.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: adamtheturtle

pyproject.toml

@@ -301,8 +301,8 @@ keep_full_version = true
 max_supported_python = "3.14"
 
 [tool.pytest]
-ini_options.xfail_strict = true
-ini_options.log_cli = true
+xfail_strict = true
+log_cli = true
 
 [tool.coverage]
 run.branch = true