We are adding an `avatar` column to the `threads` table in the `clientDB` and including an `avatar` field in the `Thread` struct. At the moment, the value of this field will always be `NULL` until we make some necessary changes. These changes involve modifying:
1. The translation functions that convert between `ClientDBThreadInfo` and `ThreadInfo`.
2. The C++ code responsible for constructing JSI `ClientDBThreadInfo` objects from the `threads` table rows retrieved from the database on the "JS side."
Once these changes have been made, we will be able to update the `avatar` field in the `threads` table and properly utilize the new `avatar` column.