Remove CREATE DATABASE from schema script - database already created via config

sql/schema_init/create_database_schema.sql

@@ -7,6 +7,9 @@
 -- Dumped from database version 18.3
 -- Dumped by pg_dump version 18.3
 
+-- NOTE: Database creation is handled automatically by Jellyfin using configuration from database.xml
+-- This script only creates schemas, tables, indexes, and constraints within the existing database
+
 SET statement_timeout = 0;
 SET lock_timeout = 0;
 SET idle_in_transaction_session_timeout = 0;