ci(backend): 添加 unused 配置

backend/.golangci.yml

@@ -549,7 +549,26 @@ linters:
         # Use 'fmt.Fprintf(x, ...)' instead of 'x.Write(fmt.Sprintf(...))'.
         # https://staticcheck.dev/docs/checks/#QF1012
         - QF1012
+    unused:
+      # Mark all struct fields that have been written to as used.
+      # Default: true
+      field-writes-are-uses: false
+      # Treat IncDec statement (e.g. `i++` or `i--`) as both read and write operation instead of just write.
+      # Default: false
+      post-statements-are-reads: true
+      # Mark all exported fields as used.
+      # default: true
+      exported-fields-are-used: false
+      # Mark all function parameters as used.
+      # default: true
+      parameters-are-used: true
+      # Mark all local variables as used.
+      # default: true
+      local-variables-are-used: false
+      # Mark all identifiers inside generated files as used.
+      # Default: true
+      generated-is-used: false
 
 formatters:
   enable:
-    - gofmt
+    - gofmt