feat: GetTitles now returns all the field needed

sql/migrations/000001_init.up.sql

@@ -14,6 +14,7 @@ CREATE TABLE providers (
 
 CREATE TABLE tags (
     id                  bigint              GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+    -- example: { "ru": "Сёдзё", "en": "Shojo", "jp": "少女"}
     tag_names           jsonb               NOT NULL
 );