Enable nullable annotations for Volo.Abp.BackgroundJobs.HangFire

framework/src/Volo.Abp.BackgroundJobs.HangFire/Volo.Abp.BackgroundJobs.HangFire.csproj

@@ -5,6 +5,8 @@
 
   <PropertyGroup>
     <TargetFrameworks>netstandard2.0;netstandard2.1;net7.0</TargetFrameworks>
+    <Nullable>enable</Nullable>
+    <WarningsAsErrors>Nullable</WarningsAsErrors>
     <AssemblyName>Volo.Abp.BackgroundJobs.HangFire</AssemblyName>
     <PackageId>Volo.Abp.BackgroundJobs.HangFire</PackageId>
     <AssetTargetFallback>$(AssetTargetFallback);portable-net45+win8+wp8+wpa81;</AssetTargetFallback>

framework/src/Volo.Abp.BackgroundJobs.HangFire/Volo/Abp/BackgroundJobs/Hangfire/AbpBackgroundJobsHangfireModule.cs

@@ -30,7 +30,7 @@ public class AbpBackgroundJobsHangfireModule : AbpModule
         }
     }
 
-    private BackgroundJobServer CreateOnlyEnqueueJobServer(IServiceProvider serviceProvider)
+    private BackgroundJobServer? CreateOnlyEnqueueJobServer(IServiceProvider serviceProvider)
     {
         serviceProvider.GetRequiredService<JobStorage>();
         return null;

framework/src/Volo.Abp.BackgroundJobs.HangFire/Volo/Abp/BackgroundJobs/Hangfire/HangfireJobExecutionAdapter.cs

@@ -39,7 +39,7 @@ public class HangfireJobExecutionAdapter<TArgs>
         using (var scope = ServiceScopeFactory.CreateScope())
         {
             var jobType = Options.GetJob(typeof(TArgs)).JobType;
-            var context = new JobExecutionContext(scope.ServiceProvider, jobType, args, cancellationToken: cancellationToken);
+            var context = new JobExecutionContext(scope.ServiceProvider, jobType, args!, cancellationToken: cancellationToken);
             await JobExecuter.ExecuteAsync(context);
         }
     }