fix: Resolve issue with Data object serialization (#1407)

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## Description
Enable Data object serialization when returning PipelineRunInfo type
objects in backend

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- [ ] Performance improvement
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- 
- 
- 

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cognee/modules/pipelines/models/PipelineRunInfo.py

@@ -1,6 +1,7 @@
-from typing import Any, Optional
+from typing import Any, Optional, List, Union
 from uuid import UUID
 from pydantic import BaseModel
+from cognee.modules.data.models.Data import Data
 
 
 class PipelineRunInfo(BaseModel):
@@ -8,11 +9,15 @@ class PipelineRunInfo(BaseModel):
     pipeline_run_id: UUID
     dataset_id: UUID
     dataset_name: str
-    payload: Optional[Any] = None
+    # Data must be mentioned in typing to allow custom encoders for Data to be activated
+    payload: Optional[Union[Any, List[Data]]] = None
     data_ingestion_info: Optional[list] = None
 
     model_config = {
         "arbitrary_types_allowed": True,
+        "from_attributes": True,
+        # Add custom encoding handler for Data ORM model
+        "json_encoders": {Data: lambda d: d.to_json()},
     }