Transform User B events analytics table to analytics table which contain events from both User B and User A

[danmash]

User story

As an analyst, I want to history log of the state changes occurring in the conversation table (when new state gets written to the conversation table, then that change should be registered as a user A event and thus make a new row in the conversations analytics table, so I know when it occurred

Acceptance criteria

• user_b_analytics_data table should be renamed conversation_analytics_data, as well as all related functions/classes #415
• And any conversation state changes for user A need to be tracked in this conversation_analytics_data
• unit tests for the edit_conversation endpoint adjusted to check analytics record #416