fix: an album holding every track of an edition, and more besides, is that release group (M502 #5569)

Savant's "Void" folder holds all 23 tracks of the VOID (DLC) edition plus
20 more, and was refused at 23 of 43. A whole edition of three or more
tracks now matches whatever else the folder holds; singles and two-track
releases still need most of the album's tracks, since many albums hold
their songs. Matcher version 4 retries the refusals.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/wanted/library_test.go

@@ -277,9 +277,12 @@ func TestTrackAgreement(t *testing.T) {
 	if len(copies) != 2 {
 		t.Errorf("a second copy of a track is read once: %+v", copies)
 	}
-	if agrees(3, 4) || !agrees(4, 5) || agrees(0, 0) {
+	if agrees(3, 4, 0) || !agrees(4, 5, 0) || agrees(0, 0, 0) {
 		t.Error("agrees: 80% of the album's tracks, and an album has tracks")
 	}
+	if !agrees(23, 43, 23) || agrees(2, 10, 2) || agrees(22, 43, 23) {
+		t.Error("agrees: a whole edition of three or more tracks, with more besides")
+	}
 }
 
 // A refusal by an older matcher is matched again once the matching improves,