refactor(backend): no-unused-vars

eslint.config.ts

@@ -28,6 +28,23 @@ export default [
             reportUnusedInlineConfigs: 'error',
         },
         rules: {
+            'no-unused-expressions': 'off',
+            '@typescript-eslint/no-unused-expressions': 'warn',
+            'no-unused-vars': 'off',
+            '@typescript-eslint/no-unused-vars': [
+                'warn',
+                {
+                    'args': 'all',
+                    'argsIgnorePattern': '^_',
+                    'caughtErrors': 'all',
+                    'caughtErrorsIgnorePattern': '^_',
+                    'varsIgnorePattern': '^_',
+                    'ignoreRestSiblings': true,
+                }
+            ],
+            'no-use-before-define': 'off',
+            '@typescript-eslint/no-use-before-define': 'off',
+
             'no-await-in-loop': 'warn',
             'no-constructor-return': 'error',
             'no-duplicate-imports': 'error',
@@ -36,12 +53,8 @@ export default [
             'no-template-curly-in-string': 'error',
             'no-unmodified-loop-condition': 'warn',
             'no-unreachable-loop': 'warn',
-            'no-use-before-define': 'error',
             'no-useless-assignment': 'error',
 
-            'no-unused-vars': 'off',
-            '@typescript-eslint/no-unused-vars': 'error',
-
             'arrow-body-style': ['warn', 'as-needed'],
             'block-scoped-var': 'warn',
             camelcase: 'warn',