초기 coverage 값 수정

.gitea/coverage.json

@@ -1,7 +1,7 @@
 {
     "Path": "./backend/coverage.out",
     "Thresholds": {
-        "baron-sso-backend/internal/handler": 90,
+        "baron-sso-backend/internal/handler": 10,
-        "baron-sso-backend/internal/service": 90
+        "baron-sso-backend/internal/service": 10
     }
 }