chore: HuggingFaceLocalGenerator telemetry (#6070)

* add telemetry to pipelines 2.0

* only collect data if telemetry is on

* reno

* add downsampling

* typing

* manual tests

* pylint

* simplify code

* Update haystack/preview/telemetry/__init__.py

* look for _telemetry_data

* rather index by component type

* black

* mypy

* error handling

* comment

* review feedback & small improvements

* defaultdict

* stray changes

* try-catch

* method instead of attribute

* fixes

* remove print statements

* lint

* invert condition

* always send the first event of the day

* collect specs

* track 2nd and 3rd events too

* send first event and then max 1 event a minute

* rename constant

* black

* add telemetry details to HuggingFaceLocalGenerator

* add test

* check if the model is a string

---------

Co-authored-by: Stefano Fiorucci <[email protected]>

haystack/preview/components/generators/hugging_face/hugging_face_local.py

@@ -110,6 +110,14 @@ def __init__(
         self.generation_kwargs = generation_kwargs
         self.pipeline = None
 
+    def _get_telemetry_data(self) -> Dict[str, Any]:
+        """
+        Data that is sent to Posthog for usage analytics.
+        """
+        if isinstance(self.pipeline_kwargs["model"], str):
+            return {"model": self.pipeline_kwargs["model"]}
+        return {"model": f"[object of type {type(self.pipeline_kwargs['model'])}]"}
+
     def warm_up(self):
         if self.pipeline is None:
             self.pipeline = pipeline(**self.pipeline_kwargs)