[Feature] Timeseries Pathway view (#319)

**Warning depends on Timeseries feature to be merged**

Implements a way to display OECD 301F data on the pathway view.
This is mostly a PoC and needs to be improved once the pathway rendering is updated.

![image.png](/attachments/053965d7-78f7-487a-b5d0-898612708fa3)

Co-authored-by: jebus <lorsbach@envipath.com>
Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#319
Co-authored-by: Tobias O <tobias.olenyi@envipath.com>
Co-committed-by: Tobias O <tobias.olenyi@envipath.com>

epdb/models.py

@@ -2189,6 +2189,7 @@ class Node(EnviPathModel, AliasMixin, ScenarioMixin):
                 "uncovered_functional_groups": False,
             },
             "is_engineered_intermediate": self.kv.get("is_engineered_intermediate", False),
+            "timeseries": self.get_timeseries_data(),
         }
 
     @staticmethod
@@ -2226,6 +2227,13 @@ class Node(EnviPathModel, AliasMixin, ScenarioMixin):
     def as_svg(self):
         return IndigoUtils.mol_to_svg(self.default_node_label.smiles)
 
+    def get_timeseries_data(self):
+        for scenario in self.scenarios.all():
+            for ai in scenario.get_additional_information():
+                if ai.__class__.__name__ == "OECD301FTimeSeries":
+                    return ai.model_dump(mode="json")
+        return None
+
     def get_app_domain_assessment_data(self):
         data = self.kv.get("app_domain_assessment", None)