Tweak Sqlite connection settings to reduce database locked errors

Related resources:
- https://litestream.io/tips/
- https://unixsheikh.com/articles/sqlite-the-only-database-you-will-ever-need-in-most-cases.html

app/Model/ConfigModel.php

@@ -72,6 +72,26 @@ class ConfigModel extends SettingModel
         return DB_DRIVER === 'sqlite' ? filesize(DB_FILENAME) : 0;
     }
 
+    /**
+     * Get database extra options
+     *
+     * @access public
+     * @return array
+     */
+    public function getDatabaseOptions()
+    {
+        if (DB_DRIVER === 'sqlite') {
+            return [
+                'journal_mode' => $this->db->getConnection()->query('PRAGMA journal_mode')->fetchColumn(),
+                'wal_autocheckpoint' => $this->db->getConnection()->query('PRAGMA wal_autocheckpoint')->fetchColumn(),
+                'synchronous' => $this->db->getConnection()->query('PRAGMA synchronous')->fetchColumn(),
+                'busy_timeout' => $this->db->getConnection()->query('PRAGMA busy_timeout')->fetchColumn(),
+            ];
+        }
+
+        return [];
+    }
+
     /**
      * Regenerate a token
      *