fix: update UUID generation and message handling

[paul-paliychuk]

:rocket:	This description was created by Ellipsis for commit 6c2c55e37d4c2627ff3e7a9337001668274b6054

fix: update UUID generation and message handling

Summary:

Update UUID generation and refine message handling in ingest.py and retrieve.py.

Key points:

• UUID Generation: Change from uuid4().hex to str(uuid4()) in Edge and Node classes.
• Ingest Router: Add uuid parameter to add_episode in add_messages_task().
• Retrieve Router: Modify get_entity_edge() to return get_fact_result_from_edge(entity_edge).

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