feat: expose created_by in script template response schemas

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/app/schemas/script_template.py

@@ -82,6 +82,7 @@ class ScriptTemplateListItem(BaseModel):
     id: UUID
     category_id: UUID
     team_id: Optional[UUID] = None
+    created_by: Optional[UUID] = None
     name: str
     slug: str
     description: Optional[str] = None