test(db): link PostgreSqlTestServer instead of referencing Jellyfin.Server.Tests

tests/Jellyfin.Database.Tests.PostgreSQL/Jellyfin.Database.Tests.PostgreSQL.csproj

@@ -9,6 +9,7 @@
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" />
     <PackageReference Include="Npgsql" />
+    <PackageReference Include="Testcontainers.PostgreSql" />
     <PackageReference Include="xunit.v3" />
     <PackageReference Include="xunit.runner.visualstudio">
       <PrivateAssets>all</PrivateAssets>
@@ -17,10 +18,14 @@
     <PackageReference Include="coverlet.collector" />
   </ItemGroup>
 
+  <ItemGroup>
+    <!-- Linked, not project-referenced: Jellyfin.Server.Tests drags the whole server into this output. -->
+    <Compile Include="..\Jellyfin.Server.Tests\Migrations\PostgreSqlTestServer.cs" Link="Migrations\PostgreSqlTestServer.cs" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\..\src\Jellyfin.Database\Jellyfin.Database.Providers.PostgreSQL\Jellyfin.Database.Providers.PostgreSQL.csproj" />
     <ProjectReference Include="..\..\src\Jellyfin.Database\Jellyfin.Database.Implementations\Jellyfin.Database.Implementations.csproj" />
-    <ProjectReference Include="..\Jellyfin.Server.Tests\Jellyfin.Server.Tests.csproj" />
   </ItemGroup>
 
 </Project>