chore: post-merge polish for historic-analysis refactor

historic-analysis/export_metrics.py

@@ -437,11 +437,11 @@ def calculate_daily_metrics(self, messages, conversations):
                     user_msg_id = message.get('messageId')
                     user = message.get('user')
                     ai_responses = self._ai_responses_by_parent.get(user_msg_id, ())
-                    
+
                     for ai_msg in ai_responses:
                         tokens_by_model[ai_msg['model']]['input'] += token_count
-                        if user and ai_responses:
-                            tokens_by_user[user]['input'] += token_count
+                    if user:
+                        tokens_by_user[user]['input'] += token_count * len(ai_responses)
 
                 elif message.get('model'):
                     tokens_by_model[model_name]['output'] += token_count

historic-analysis/mariadb-init/init.sql

@@ -1,4 +1,8 @@
--- Drop and recreate database
+-- WARNING: this script is intended for first-time MariaDB volume init only.
+-- The `mariadb-init` directory is executed by the official MariaDB image
+-- exclusively when the data directory is empty, so it is safe in that
+-- context. Do NOT run this manually against a populated volume — it will
+-- DROP the metrics database and wipe all historical data.
 DROP DATABASE IF EXISTS metrics;
 CREATE DATABASE metrics;
 CREATE USER IF NOT EXISTS 'metrics'@'%' IDENTIFIED BY 'metrics';