adding const for compatibility

app/init.php

@@ -143,6 +143,9 @@
 const APP_SOCIAL_YOUTUBE = 'https://www.youtube.com/c/appwrite?sub_confirmation=1';
 const APP_HOSTNAME_INTERNAL = 'appwrite';
 
+// Databases
+const DATABASE_SHARED_TABLES = 'database_db_fra1_self_hosted_16_0';
+
 // Database Reconnect
 const DATABASE_RECONNECT_SLEEP = 2;
 const DATABASE_RECONNECT_MAX_ATTEMPTS = 10;