usage_id int not_null auto_increment
gpt_id int null
promptTokens int null
completionTokens int null
totalTokens int null
ia_type varchar(255) default null
model varchar(255) default null
date_added date default null

--
primary usage_id
idx_usage_id usage_id

##
engine innodb
character_set utf8mb4
collate utf8mb4_unicode_ci