UnleashProvider.track has the wrong signature: client.track raises TypeError instead of no-op

Summary

UnleashProvider.track() declares a narrower signature than the one OpenFeatureClient.track calls, so any client.track(...) call raises TypeError instead of no-opping.

Details

openfeature-sdk 0.9.0 added tracking. OpenFeatureClient.track dispatches with three positional arguments:

self.provider.track(tracking_event_name, merged_eval_context, tracking_event_details)

The provider's no-op takes two (unleash/__init__.py):

def track(self, event_name: str, event_details: dict | None = None) -> None:
    """No-op tracking method. ..."""
    return None

Requirement 6.1.1 says the client's track MUST be a no-op when the provider does not implement tracking — so the method that exists to satisfy that is the thing breaking it.

Reproduction

from openfeature import api
from openfeature.contrib.provider.unleash import UnleashProvider

provider = UnleashProvider(url="http://localhost:4242/api", app_name="repro", api_token="token")
api.set_provider(provider)
api.get_client().track("my-event")

TypeError: UnleashProvider.track() takes from 2 to 3 positional arguments but 4 were given

Reproduced against openfeature-provider-unleash at main with openfeature-sdk 0.10.0.

Why it has gone unnoticed

The workspace uv.lock still resolves openfeature-sdk 0.8.4, which has no tracking API at all, so CI never exercises this path. A released install does: the package declares openfeature-sdk>=0.8.2, so a fresh pip install openfeature-provider-unleash resolves 0.10.0 and the call raises.

mypy reports it as two [override] errors as soon as the SDK moves to 0.9.0+:

src/openfeature/contrib/provider/unleash/__init__.py:139: error: Signature of "track" incompatible with supertype "openfeature.provider.AbstractProvider"  [override]
src/openfeature/contrib/provider/unleash/__init__.py:139: error: Signature of "track" incompatible with supertype "openfeature.provider.FeatureProvider"  [override]

The existing assert hasattr(provider, "track") in tests/test_provider.py cannot catch it — it holds either way.

Affected versions

openfeature-provider-unleash at every released version, when paired with openfeature-sdk >= 0.9.0.

Fix

Match FeatureProvider.track(tracking_event_name, evaluation_context=None, tracking_event_details=None). (AbstractProvider.track is already a no-op with that signature, so deleting the override also works, but only at 0.9.0+.)

Start in providers/openfeature-provider-unleash/src/openfeature/contrib/provider/unleash/init.py at UnleashProvider.track and compare it with the FeatureProvider signature. Review tests/test_provider.py and add coverage for api.get_client().track("my-event") with the provider; done means the call no longer raises TypeError and the provider remains a no-op.