internal/rosa: enforce exclusions

This restores unexported artifact behaviour.

Signed-off-by: Ophestra <cat@gensokyo.uk>

cmd/mbf/internal/pkgserver/api_test.go

@@ -31,7 +31,7 @@ func TestAPIInfo(t *testing.T) {
 	checkPayload(t, resp, struct {
 		Count          int    `json:"count"`
 		HakureiVersion string `json:"hakurei_version"`
-	}{rosa.Native().Count(), info.Version()})
+	}{len(rosa.Native().Collect()), info.Version()})
 }
 
 func TestAPIGet(t *testing.T) {
@@ -92,11 +92,12 @@ func TestAPIGet(t *testing.T) {
 		)
 	})
 
+	count := len(rosa.Native().Collect())
 	t.Run("index", func(t *testing.T) {
 		t.Parallel()
 		checkValidate(
-			t, "limit=1&sort=0&index", 0, rosa.Native().Count()-1,
-			"index must be an integer between 0 and "+strconv.Itoa(rosa.Native().Count()-1),
+			t, "limit=1&sort=0&index", 0, count-1,
+			"index must be an integer between 0 and "+strconv.Itoa(count-1),
 		)
 	})