SIENTIAPDE-1712

Refactor MinioDataFramePayload usage across activities

- Updated instances of MinioDataFramePayload initialization in Gates, MLFlow, and Storage classes to use the new from_dict method for better data reconstruction from dictionaries.
- Enhanced the PredictionProcess workflow to utilize the updated payload handling.
- Added passthrough fixtures in tests to accommodate the new from_dict method for consistent testing behavior.

laborious/utils/models/minio_dataframe_payload.py

@@ -81,6 +81,38 @@ class MinioDataFramePayload:
     object_prefix: str | None = None
     uri: str | None = None
 
+    @classmethod
+    def from_dict(cls, raw: dict[str, Any] | 'MinioDataFramePayload') -> 'MinioDataFramePayload':
+        """
+        Reconstruct a MinioDataFramePayload from a plain dict produced by Temporal serialization.
+
+        Temporal converts dataclass return values into plain dicts when crossing
+        workflow/activity boundaries. This method rebuilds the typed instance so
+        that methods like ``retrieve``, ``cleanup_prefix`` and ``has_data`` are
+        available on the receiving side.
+
+        If the argument is already a MinioDataFramePayload, it is returned as-is.
+
+        Args:
+            raw: Dict with keys matching the dataclass fields
+                (last_timestamp, status, data, bucket, object_key, object_prefix, uri),
+                or an existing MinioDataFramePayload instance.
+
+        Return:
+            MinioDataFramePayload: Reconstructed (or original) instance.
+        """
+        if isinstance(raw, MinioDataFramePayload):
+            return raw
+        return cls(
+            last_timestamp=raw['last_timestamp'],
+            status=raw.get('status'),
+            data=raw.get('data'),
+            bucket=raw.get('bucket'),
+            object_key=raw.get('object_key'),
+            object_prefix=raw.get('object_prefix'),
+            uri=raw.get('uri'),
+        )
+
     @staticmethod
     def estimate_size_bytes(df: DataFrame) -> int:
         """
@@ -118,7 +150,6 @@ class MinioDataFramePayload:
         except ValueError:
             return None
 
-    @staticmethod
     def cleanup_prefix(self) -> str | None:
         """
         Return True if cleanup is enabled for this payload.