refactor: 封装 Redis key 生成函数

backend/.golangci.yml

@@ -23,6 +23,8 @@ linters:
               desc: "service must not import repository"
             - pkg: gorm.io/gorm
               desc: "service must not import gorm"
+            - pkg: github.com/redis/go-redis/v9
+              desc: "service must not import redis"
         handler-no-repository:
           list-mode: original
           files:
@@ -30,6 +32,10 @@ linters:
           deny:
             - pkg: github.com/Wei-Shaw/sub2api/internal/repository
               desc: "handler must not import repository"
+            - pkg: gorm.io/gorm
+              desc: "handler must not import gorm"
+            - pkg: github.com/redis/go-redis/v9
+              desc: "handler must not import redis"
     errcheck:
       # Report about not checking of errors in type assertions: `a := b.(MyStruct)`.
       # Such cases aren't reported by default.