fix: add service name prefix to macos syslog

Author: mlataza

internal/syslog/syslog_darwin.go

@@ -35,7 +35,7 @@ func (s *darwinSyslog) Write(data []byte) (int, error) {
 		priority = "daemon.warning"
 	}
 
-	err := s.runner.Run(priority, s.source, message)
+	err := s.runner.Run(priority, s.source, s.source+": "+message)
 	if err != nil {
 		return 0, err
 	}

internal/syslog/syslog_darwin_test.go

@@ -93,8 +93,8 @@ func TestDarwinSyslog_Write_PassesSourceAndMessage(t *testing.T) {
 	if runner.source != "my-app" {
 		t.Errorf("expected source 'my-app', got %q", runner.source)
 	}
-	if runner.message != "hello world" {
-		t.Errorf("expected message 'hello world', got %q", runner.message)
+	if runner.message != "my-app: hello world" {
+		t.Errorf("expected message 'my-app: hello world', got %q", runner.message)
 	}
 }