The report tests read only the deliveries they queued

ServiceReportTests looked at every delivery job of the last five minutes and read each body's actor. On the CI runner,
slower than the workstation, other tests' jobs were still in that window, one of them without an actor, and four cases
failed with a NullReferenceException. A test now sees only the jobs queued since it began, and checks the signer from
the job itself.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw

PrivaPub.Tests/Federation/ServiceReportTests.cs

@@ -30,6 +30,8 @@ namespace PrivaPub.Tests.Federation
 	{
 		static readonly string[] PeerHosts = { "localhost", "127.0.0.1" };
 
+		// (a test sees only the deliveries queued since it began: the others' share the database)
+		readonly DateTime _started = DateTime.UtcNow;
 		Harness _harness;
 
 		public async ValueTask InitializeAsync()
@@ -74,10 +76,9 @@ namespace PrivaPub.Tests.Federation
 			return post;
 		}
 
-		async Task<List<(DeliveryPayload Payload, JsonObject Body)>> Queued() =>
-			(await DB.Default.Find<Job>().Match(j => j.Kind == JobKind.Deliver && j.CreatedAt >= DateTime.UtcNow.AddMinutes(-5)).ExecuteAsync(Token))
+		async Task<List<DeliveryPayload>> Queued() =>
+			(await DB.Default.Find<Job>().Match(j => j.Kind == JobKind.Deliver && j.CreatedAt >= _started).ExecuteAsync(Token))
 				.Select(j => JsonSerializer.Deserialize<DeliveryPayload>(j.Payload))
-				.Select(p => (p, JsonNode.Parse(p.Body)!.AsObject()))
 				.ToList();
 
 		// a community on a Lemmy, or on a server that takes reports as Lemmy does (the peer as localhost), and one of its posters there
@@ -118,11 +119,12 @@ namespace PrivaPub.Tests.Federation
 			Assert.Equal("a slur in the title", flag["summary"]!.GetValue<string>());
 			Assert.Equal("a slur in the title", flag["content"]!.GetValue<string>());
 			Assert.Empty(await _harness.Outgoing(poster.Id + "/inbox"));
-			Assert.DoesNotContain(await Queued(), q => q.Payload.Inbox != community.SharedInbox && q.Body.ToJsonString().Contains(post.ObjectURI));
+			Assert.DoesNotContain(await Queued(), q => q.Inbox != community.SharedInbox && q.Body.Contains(post.ObjectURI));
 			Assert.DoesNotContain(alice.UserName, flag.ToJsonString());
 			Assert.DoesNotContain(alice.Id, flag.ToJsonString());
-			var queued = Assert.Single(await Queued(), q => q.Body["actor"]!.GetValue<string>() == reporter.Uri && q.Body["object"]!.GetValue<string>() == post.ObjectURI);
-			Assert.Equal(LocalActorKind.Reporter, queued.Payload.SignerKind);
+			var queued = Assert.Single(await Queued(), q => q.Inbox == community.SharedInbox);
+			Assert.Equal(LocalActorKind.Reporter, queued.SignerKind);
+			Assert.Equal(reporter.Id, queued.SignerId);
 		}
 
 		[Fact]