build(deps): pytest-asyncio for SP5 stream tests

backend/pyproject.toml

@@ -20,6 +20,7 @@ dependencies = [
 dev = [
     "pytest>=8.0",
     "pytest-cov>=4.1",
+    "pytest-asyncio>=0.23,<1",
     "httpx>=0.27,<1",
 ]
 
@@ -32,3 +33,4 @@ where = ["src"]
 [tool.pytest.ini_options]
 testpaths = ["tests"]
 addopts = "-ra --strict-markers"
+asyncio_mode = "auto"