fix(gateway): synchronize qualification stage evidence

gateway/qualification_contract_test.go

@@ -2,6 +2,7 @@ package gateway
 
 import (
 	"compress/gzip"
+	"encoding/binary"
 	"io"
 	"os"
 	"path/filepath"
@@ -142,6 +143,29 @@ func TestQualificationProcessingPreservesPayload(t *testing.T) {
 	}
 }
 
+func TestQualificationRepeatedTraversalTracksEveryProductionStage(t *testing.T) {
+	profile := qualificationMediaProfiles()[0]
+	pacerKbps := (profile.BitrateKbps*int64(profile.PacketBytes+frameHeaderSize) + int64(profile.PacketBytes) - 1) / int64(profile.PacketBytes)
+	path := newQualificationPath(t, profile, pacerKbps)
+	payload := qualificationPayload(profile)
+	if err := runQualificationWarmup(t, path, profile, payload); err != nil {
+		t.Fatal(err)
+	}
+	for index := 0; index < 10_000; index++ {
+		current := append([]byte(nil), payload...)
+		binary.BigEndian.PutUint32(current[len(current)-4:], uint32(index))
+		trace, _, err := path.traverse(t, current)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if !trace.NativeUDPIngress || !trace.ApolloRecovered || !trace.ProductionQueue ||
+			!trace.ProductionMediaLoop || !trace.ProductionPacer || !trace.VerseQUIC ||
+			!trace.PublicClientDecode || !trace.PayloadPreserved {
+			t.Fatalf("traversal %d missed a production stage: %#v", index, trace)
+		}
+	}
+}
+
 func TestQualificationImpairmentIsDeterministicAndBounded(t *testing.T) {
 	profile := qualificationImpairmentProfiles()[3]
 	first, err := runQualificationImpairment(t, profile, qualificationMediaProfiles()[0], 1000, filepath.Join(t.TempDir(), "first.csv.gz"))