feat: print build info at startup; version placeholders filled in by CI [CI SKIP]

backend/shared/MoShiro.Protocol/MoShiro.Protocol.csproj

@@ -18,7 +18,7 @@
     <ItemGroup>
       <BuildInfoLine Include="namespace MoShiro.Protocol%3B" />
       <BuildInfoLine Include="/// &lt;summary&gt;这个程序是什么时候、从哪个版本构建出来的（构建时生成）。&lt;/summary&gt;" />
-      <BuildInfoLine Include="public static class BuildInfo" />
+      <BuildInfoLine Include="public static partial class BuildInfo" />
       <BuildInfoLine Include="{" />
       <BuildInfoLine Include="    public const string Version = &quot;$(Version)&quot;%3B" />
       <BuildInfoLine Include="    public const string Tag = &quot;$(MOSHIRO_TAG)&quot;%3B" />