Store list as json instead of array in relational db table

cognee/modules/data/models/MetricData.py

@@ -1,6 +1,6 @@
 from datetime import datetime, timezone
 
-from sqlalchemy import Column, DateTime, Float, Integer, ARRAY, UUID
+from sqlalchemy import Column, DateTime, Float, Integer, JSON, UUID
 
 from cognee.infrastructure.databases.relational import Base
 from uuid import uuid4
@@ -17,7 +17,7 @@ class GraphMetricData(Base):
     mean_degree = Column(Float, nullable=True)
     edge_density = Column(Float, nullable=True)
     num_connected_components = Column(Integer, nullable=True)
-    sizes_of_connected_components = Column(ARRAY(Integer), nullable=True)
+    sizes_of_connected_components = Column(JSON, nullable=True)
     num_selfloops = Column(Integer, nullable=True)
     diameter = Column(Integer, nullable=True)
     avg_shortest_path_length = Column(Float, nullable=True)