fix(pytest): Workaround unraisableexception plugin crash

Disables the unraisableexception plugin in pytest due to a known bug in
pytest>=9.1 where it crashes with tracemalloc errors when multiple
unraisable exceptions occur close together.

pyproject.toml

@@ -116,6 +116,12 @@ python_functions = ["test_*"]
 addopts = [
     "-v",
     "--strict-markers",
+    # pytest>=9.1 has a known bug where its unraisableexception plugin crashes
+    # (tracemalloc partially-initialized AttributeError) when 2+ unraisable
+    # exceptions land close together — e.g. "coroutine was never awaited" from
+    # AsyncMock-mocked sync methods (metrics_controller, minio_repository) being
+    # GC'd. Harmless mock artifacts turned into a hard ERROR by the plugin itself.
+    "-p", "no:unraisableexception",
 ]
 markers = [
     "asyncio: marks tests as async",