Implement rate limiting middleware for authentication endpoints, adding security headers middleware, and comprehensive error handling. Enhance validation tests for various DTOs and ensure proper functionality of gacha credits and rolls. Add unit tests for rate limiting and security headers middleware to validate behavior under different conditions.

imphnen-gacha/src/v1/gacha_credits/gacha_credits_repository.rs

@@ -25,9 +25,9 @@ impl<'a> GachaCreditRepository<'a> {
 		let now = Instant::now();
 		let db = &self.state.surrealdb_ws;
 		let sql = format!(
-			"SELECT * FROM {} WHERE user = {}:⟨$user_id⟩ AND is_deleted = false LIMIT 1",
+			"SELECT * FROM {} WHERE user = type::thing('{}', $user_id) AND is_deleted = false LIMIT 1",
 			ResourceEnum::GachaCredits,
-			ResourceEnum::Users
+			ResourceEnum::Users.as_str()
 		);
 		info!(query = %sql, "Executing SurrealDB query");
 		let result: Vec<GachaCreditSchema> =