Feature/params metadata (#86)

* add `variables_metadata` to metadata

Author: b8raoult

CHANGELOG.md

@@ -36,6 +36,10 @@ Keep it human-readable, your future self will thank you!
 
 - Add `variables_metadata` entry in the dataset metadata
 
+### Changed
+
+- Add `variables_metadata` entry in the dataset metadata
+
 ## [0.5.5](https://github.com/ecmwf/anemoi-datasets/compare/0.5.4...0.5.5) - 2024-10-04
 
 ### Changed

src/anemoi/datasets/data/dataset.py

@@ -284,6 +284,7 @@ def dataset_metadata(self):
             specific=self.metadata_specific(),
             frequency=self.frequency,
             variables=self.variables,
+            variables_metadata=self.variables_metadata,
             shape=self.shape,
             start_date=self.start_date.astype(str),
             end_date=self.end_date.astype(str),