Promote current session artifacts to storage

internal/adapters/storage/fake.go

@@ -28,6 +28,7 @@ type FakeBackend struct {
 	Result   ArchiveResult
 
 	Objects map[string]FakeObject
+	Uploads []FakeUploadCall
 
 	ListErr     error
 	DownloadErr error
@@ -35,6 +36,13 @@ type FakeBackend struct {
 	ExistsErr   error
 }
 
+// FakeUploadCall captures one upload invocation in call order.
+type FakeUploadCall struct {
+	LocalPath string
+	Key       string
+	Options   UploadOptions
+}
+
 // Archive records request and returns configured response.
 func (f *FakeBackend) Archive(ctx context.Context, req ArchiveRequest) (ArchiveResult, error) {
 	if err := ctx.Err(); err != nil {
@@ -153,6 +161,14 @@ func (f *FakeBackend) Upload(ctx context.Context, localPath, key string, opts Up
 	}
 
 	normalizedKey := normalizeObjectKey(key)
+	f.Uploads = append(f.Uploads, FakeUploadCall{
+		LocalPath: localPath,
+		Key:       normalizedKey,
+		Options: UploadOptions{
+			Metadata:    copyMetadata(opts.Metadata),
+			ContentType: opts.ContentType,
+		},
+	})
 	now := time.Now().UTC()
 	obj := FakeObject{
 		Key:          normalizedKey,