add pytest-subtets as dev dependency

Author: amirreza8002

pyproject.toml

@@ -69,6 +69,7 @@ dev = [
     "pytest-asyncio>=0.26.0",
     "pytest-django>=4.11.1",
     "pytest-mock>=3.14.0",
+    "pytest-subtests>=0.14.1",
     "ruff>=0.11.6",
 ]
 docs = [