fix: prune missing image indexes and align instance creation payload

internal/api/images_index_concurrency_test.go

@@ -93,22 +93,19 @@ func TestImageIndexDoesNotUndoConcurrentDelete(t *testing.T) {
 					if im.ImageID == id {
 						matches++
 					}
-					if im.ImageID == id && im.Status != "missing" {
-						t.Errorf("returned deleted image as %s", im.Status)
-					}
 				}
-				if matches != 1 {
-					t.Errorf("returned %d records for deleted image, want 1", matches)
+				if matches != 0 {
+					t.Errorf("returned %d records for deleted image, want 0", matches)
 				}
 			case <-ctx.Done():
 				t.Fatal("index did not finish")
 			}
-			var status string
-			if err := a.s.DB.QueryRow("SELECT status FROM images WHERE image_id=?", id).Scan(&status); err != nil {
+			var count int
+			if err := a.s.DB.QueryRow("SELECT count(*) FROM images WHERE image_id=?", id).Scan(&count); err != nil {
 				t.Fatal(err)
 			}
-			if status != "missing" {
-				t.Errorf("persisted deleted image as %s", status)
+			if count != 0 {
+				t.Errorf("persisted %d rows for deleted image", count)
 			}
 		})
 	}