fix(ci): ignore pyparsing deprecation warnings from OMPython

OMPython uses deprecated pyparsing functions (infixNotation) that
trigger PyparsingDeprecationWarning. Since this is a third-party
issue, add a filter to ignore these warnings in pytest.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: prudhomm

pyproject.toml

@@ -97,6 +97,8 @@ xfail_strict = true
 filterwarnings = [
   "error",
   "ignore:(ast.Str|Attribute s|ast.NameConstant|ast.Num) is deprecated:DeprecationWarning:_pytest",
+  # OMPython uses deprecated pyparsing functions (infixNotation -> infix_notation)
+  "ignore:.*deprecated.*:pyparsing.warnings.PyparsingDeprecationWarning",
 ]
 
 [tool.ruff]