New database events schema in python

Hi, I just checked on adk-python events table that it only uses single `events` column for storing jsonb of the event now. On the other hand, adk-go still uses separate column to store events information on different columns. Is there any plan to make adk-go using similar schema?

Currently Im trying to implement Gemini Live support for adk-go in #567, however im not able to store information about input and output transcription to the events table since there is no column for that. I am considering it cant be stored on the `content` column. Any suggestion?

Thanks!

The payload names the adk-go events table and related work in #567; start by reviewing the existing event schema and how that work records transcription data. Done means deciding on a schema that stores Gemini Live input and output transcription without relying on the content column, aligned with adk-python.

Written by the indexing model from the issue text.