ModelInferenceLogsDatabase cleanup

[rithvik-doshi]

• Remove unused fields from the room table, add agent type to messages
• Add checks to physical relation and determine discrepancies in columns in the owl creator.
  • Accordingly, generate owl and let the model utils init function know if there are any changes made so that migrations can take place.
• Fixes unit tests

To test, restart server, ensure database changes are made, and test playground and ensure things operate normally.

Expected changes:

• removal of model_id, agent_id, agent_type columns from room table
• addition of agent_type column to message table
• all unit tests should pass

Note: Removes support for usage of room.model_id or room.agent_id across the platform. For usage tracking, use message.agent_id