前端：

1、优化消息排序逻辑
2、新增加载历史消息
3、修复已知问题
后端：
1、优化消息排序逻辑
2、增加用户信息缓存机制
3、修改日期类型为DateTimeOffset改善时区信息丢失问题
3、修复了已知问题
数据库：
1、新增SequenceId字段用于消息排序
2、新增ClientMsgId字段用于客户端消息回执

backend/IMTest/obj/project.nuget.cache

@@ -1,6 +1,6 @@
 {
   "version": 2,
-  "dgSpecHash": "tVGTA3KwBHQ=",
+  "dgSpecHash": "ueA0djhC8vQ=",
   "success": true,
   "projectFilePath": "C:\\Users\\nanxun\\Documents\\IM\\backend\\IMTest\\IMTest.csproj",
   "expectedPackageFiles": [
@@ -32,6 +32,7 @@
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.aspnetcore.signalr.protocols.json\\1.2.0\\microsoft.aspnetcore.signalr.protocols.json.1.2.0.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.aspnetcore.websockets\\2.3.0\\microsoft.aspnetcore.websockets.2.3.0.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.aspnetcore.webutilities\\2.3.0\\microsoft.aspnetcore.webutilities.2.3.0.nupkg.sha512",
+    "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.bcl.asyncinterfaces\\1.1.0\\microsoft.bcl.asyncinterfaces.1.1.0.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.codecoverage\\17.8.0\\microsoft.codecoverage.17.8.0.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.csharp\\4.7.0\\microsoft.csharp.4.7.0.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.entityframeworkcore\\8.0.22\\microsoft.entityframeworkcore.8.0.22.nupkg.sha512",
@@ -40,21 +41,22 @@
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.entityframeworkcore.inmemory\\8.0.22\\microsoft.entityframeworkcore.inmemory.8.0.22.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.entityframeworkcore.relational\\8.0.13\\microsoft.entityframeworkcore.relational.8.0.13.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.apidescription.server\\6.0.5\\microsoft.extensions.apidescription.server.6.0.5.nupkg.sha512",
-    "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.caching.abstractions\\8.0.0\\microsoft.extensions.caching.abstractions.8.0.0.nupkg.sha512",
+    "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.caching.abstractions\\10.0.2\\microsoft.extensions.caching.abstractions.10.0.2.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.caching.memory\\8.0.1\\microsoft.extensions.caching.memory.8.0.1.nupkg.sha512",
+    "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.caching.stackexchangeredis\\10.0.2\\microsoft.extensions.caching.stackexchangeredis.10.0.2.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.configuration.abstractions\\8.0.0\\microsoft.extensions.configuration.abstractions.8.0.0.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.dependencyinjection\\8.0.1\\microsoft.extensions.dependencyinjection.8.0.1.nupkg.sha512",
-    "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.dependencyinjection.abstractions\\8.0.2\\microsoft.extensions.dependencyinjection.abstractions.8.0.2.nupkg.sha512",
+    "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.dependencyinjection.abstractions\\10.0.2\\microsoft.extensions.dependencyinjection.abstractions.10.0.2.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.diagnostics.abstractions\\8.0.1\\microsoft.extensions.diagnostics.abstractions.8.0.1.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.diagnostics.healthchecks\\8.0.0\\microsoft.extensions.diagnostics.healthchecks.8.0.0.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.diagnostics.healthchecks.abstractions\\8.0.0\\microsoft.extensions.diagnostics.healthchecks.abstractions.8.0.0.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.fileproviders.abstractions\\8.0.0\\microsoft.extensions.fileproviders.abstractions.8.0.0.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.hosting.abstractions\\8.0.1\\microsoft.extensions.hosting.abstractions.8.0.1.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.logging\\8.0.1\\microsoft.extensions.logging.8.0.1.nupkg.sha512",
-    "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.logging.abstractions\\8.0.2\\microsoft.extensions.logging.abstractions.8.0.2.nupkg.sha512",
+    "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.logging.abstractions\\10.0.2\\microsoft.extensions.logging.abstractions.10.0.2.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.objectpool\\8.0.11\\microsoft.extensions.objectpool.8.0.11.nupkg.sha512",
-    "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.options\\8.0.2\\microsoft.extensions.options.8.0.2.nupkg.sha512",
-    "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.primitives\\8.0.0\\microsoft.extensions.primitives.8.0.0.nupkg.sha512",
+    "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.options\\10.0.2\\microsoft.extensions.options.10.0.2.nupkg.sha512",
+    "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.extensions.primitives\\10.0.2\\microsoft.extensions.primitives.10.0.2.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.identitymodel.abstractions\\8.14.0\\microsoft.identitymodel.abstractions.8.14.0.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.identitymodel.jsonwebtokens\\8.14.0\\microsoft.identitymodel.jsonwebtokens.8.14.0.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\microsoft.identitymodel.logging\\8.14.0\\microsoft.identitymodel.logging.8.14.0.nupkg.sha512",
@@ -78,6 +80,7 @@
     "C:\\Users\\nanxun\\.nuget\\packages\\pipelines.sockets.unofficial\\2.2.8\\pipelines.sockets.unofficial.2.2.8.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\pomelo.entityframeworkcore.mysql\\8.0.3\\pomelo.entityframeworkcore.mysql.8.0.3.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\rabbitmq.client\\7.1.2\\rabbitmq.client.7.1.2.nupkg.sha512",
+    "C:\\Users\\nanxun\\.nuget\\packages\\redlock.net\\2.3.2\\redlock.net.2.3.2.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\runtime.debian.8-x64.runtime.native.system.security.cryptography.openssl\\4.3.0\\runtime.debian.8-x64.runtime.native.system.security.cryptography.openssl.4.3.0.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\runtime.fedora.23-x64.runtime.native.system.security.cryptography.openssl\\4.3.0\\runtime.fedora.23-x64.runtime.native.system.security.cryptography.openssl.4.3.0.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\runtime.fedora.24-x64.runtime.native.system.security.cryptography.openssl\\4.3.0\\runtime.fedora.24-x64.runtime.native.system.security.cryptography.openssl.4.3.0.nupkg.sha512",
@@ -105,7 +108,7 @@
     "C:\\Users\\nanxun\\.nuget\\packages\\system.collections.concurrent\\4.3.0\\system.collections.concurrent.4.3.0.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\system.console\\4.3.0\\system.console.4.3.0.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\system.diagnostics.debug\\4.3.0\\system.diagnostics.debug.4.3.0.nupkg.sha512",
-    "C:\\Users\\nanxun\\.nuget\\packages\\system.diagnostics.diagnosticsource\\4.3.0\\system.diagnostics.diagnosticsource.4.3.0.nupkg.sha512",
+    "C:\\Users\\nanxun\\.nuget\\packages\\system.diagnostics.diagnosticsource\\10.0.2\\system.diagnostics.diagnosticsource.10.0.2.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\system.diagnostics.eventlog\\6.0.0\\system.diagnostics.eventlog.6.0.0.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\system.diagnostics.tools\\4.3.0\\system.diagnostics.tools.4.3.0.nupkg.sha512",
     "C:\\Users\\nanxun\\.nuget\\packages\\system.diagnostics.tracing\\4.3.0\\system.diagnostics.tracing.4.3.0.nupkg.sha512",