chore: Add debug logging to ELABDATADISP consolidation

Added logging to track which nodes are being consolidated and how many
measurement categories each node has. This helps debug cases where data
appears to be lost during consolidation.

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Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

src/transformers/data_transformer.py

@@ -402,6 +402,13 @@ class DataTransformer:
                 # Store measurements with node number as key
                 consolidated_measurements[str(node_num)] = node_measurements
 
+                # Log consolidation to help debug
+                if len(group_rows) > 1:
+                    logger.debug(
+                        f"Consolidating node {node_num} for unit={key[0]}, tool={key[1]}, "
+                        f"timestamp={key[3]}: {len(node_measurements)} measurement categories"
+                    )
+
             # Use the row with minimum id as template for other fields
             min_id_row = min(group_rows, key=lambda r: r["idElabData"])
             # Use the row with maximum id for the consolidated row ID (for proper resume)