fix: recover gateway callbacks and client send flows

gateway/internal/resultoutbox/outbox_test.go

@@ -3,6 +3,7 @@ package resultoutbox
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"net/http"
 	"net/http/httptest"
 	"sync/atomic"
@@ -33,6 +34,52 @@ func TestPublishSubmitSegmentIsIdempotent(t *testing.T) {
 	}
 }
 
+func TestUplinkWithoutPlatformMessageIDIsAValidOutboxEvent(t *testing.T) {
+	mr := miniredis.RunT(t)
+	client := redis.NewClient(&redis.Options{Addr: mr.Addr()})
+	outbox := New(client)
+	event := queue.UplinkEvent{
+		Envelope: queue.Envelope{
+			SchemaVersion: queue.SchemaVersion,
+			MessageType:   queue.MessageTypeUplinkEvent,
+			ChannelID:     "channel-1",
+			CreatedAt:     time.Now().UTC(),
+		},
+		SequenceID: 1, PhoneNumber: "13800138000", DestID: "10690001",
+		Content: "UP", ReceivedAt: time.Now().UTC(),
+	}
+	if err := outbox.PublishUplink(context.Background(), event); err != nil {
+		t.Fatalf("publish uplink: %v", err)
+	}
+	streams, err := client.XRange(context.Background(), outbox.StreamName(), "-", "+").Result()
+	if err != nil || len(streams) != 1 {
+		t.Fatalf("read uplink stream: entries=%d err=%v", len(streams), err)
+	}
+	parsed, err := EventFromStreamValues(streams[0].Values)
+	if err != nil {
+		t.Fatalf("parse uplink without messageId: %v", err)
+	}
+	if parsed.EventType != "uplink" || parsed.MessageID != "" {
+		t.Fatalf("unexpected uplink envelope: %+v", parsed)
+	}
+}
+
+func TestRetryUntilCanceledRestartsAfterTransientFailure(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	calls := 0
+	err := retryUntilCanceled(ctx, time.Millisecond, func() error {
+		calls++
+		if calls == 1 {
+			return errors.New("transient Redis read timeout")
+		}
+		cancel()
+		return ctx.Err()
+	})
+	if !errors.Is(err, context.Canceled) || calls != 2 {
+		t.Fatalf("retry result err=%v calls=%d, want context canceled after 2 calls", err, calls)
+	}
+}
+
 func TestBatchCallbackSendsMultipleEventsInOneRequest(t *testing.T) {
 	mr := miniredis.RunT(t)
 	client := redis.NewClient(&redis.Options{Addr: mr.Addr()})