Update MariaDB config to use remote database server

Switch from localhost to Synology NAS (192.168.1.113:3307) for
centralized database hosting.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

database/mariadb.js

@@ -15,10 +15,11 @@ function logToFile(...args) {
 
 // Database configuration
 const dbConfig = {
-  host: 'localhost',
+  host: '192.168.1.113',
   user: 'deathwatch',
   password: process.env.DB_PASSWORD || 'defaultpassword',
   database: 'deathwatch',
+  port: 3307,
   waitForConnections: true,
   connectionLimit: 10,
   queueLimit: 0