优化内存分享，修复一些问题，新增答题投票功能

cmonitor/api/services/SignInClientService.cs

@@ -0,0 +1,31 @@
+using cmonitor.service.messengers.sign;
+
+namespace cmonitor.api.services
+{
+    public sealed class SignInClientService : IClientService
+    {
+        private readonly SignCaching signCaching;
+        private readonly Config config;
+        public SignInClientService(SignCaching signCaching, Config config)
+        {
+            this.signCaching = signCaching;
+            this.config = config;
+        }
+        public List<SignCacheInfo> List(ClientServiceParamsInfo param)
+        {
+            List<SignCacheInfo> caches = signCaching.Get();
+            return caches;
+        }
+        public bool Del(ClientServiceParamsInfo param)
+        {
+            signCaching.Del(param.Content);
+
+            return true;
+
+        }
+        public Config Config(ClientServiceParamsInfo param)
+        {
+            return config;
+        }
+    }
+}