# Observability

The Pipeline Event stream emitted by the orchestrators (`StructuralProfiler`)
and consumed by a user-supplied Progress Observer (ADR-0054, ADR-0055).

```{eval-rst}
.. autoclass:: dataforge_ml.observability.PipelineEvent
   :members:
   :undoc-members:
   :show-inheritance:
```

```{eval-rst}
.. autoclass:: dataforge_ml.observability.EventType
   :members:
   :undoc-members:
   :show-inheritance:
```

```{eval-rst}
.. autofunction:: dataforge_ml.observability.stderr_observer
```