fix: ugc Save rocket and car modular assembly data to database (#1279)

* Ugc: Use persistent Id for rocekts and cars

* Remove comment

* Ugc: Save rocket and car IDs to the database

* Correct names

* Database: formatting

migrations/dlu/12_modular_build_ugc.sql

@@ -0,0 +1,5 @@
+CREATE TABLE IF NOT EXISTS ugc_modular_build (
+	ugc_id BIGINT NOT NULL PRIMARY KEY,
+	character_id BIGINT NOT NULL REFERENCES charinfo(id) ON DELETE CASCADE,
+	ldf_config VARCHAR(60) NOT NULL
+);