feat(library): exclude configured folders from scanning and analysis

services/api/internal/library/scanner_test.go

@@ -55,7 +55,7 @@ func TestWalkAndHash(t *testing.T) {
 	write("_incoming/new.mp3", 10)
 	write("big.mp3", 3<<20)
 
-	found, err := walk(root, func(rel string) bool { return rel == "_incoming/new.mp3" }, nil)
+	found, err := walk(root, nil, func(rel string) bool { return rel == "_incoming/new.mp3" }, nil)
 	require.NoError(t, err)
 	assert.ElementsMatch(t, []string{"Artist/Album/01 - Song.FLAC", "big.mp3"}, rels(found))
 	for _, w := range found {
@@ -69,7 +69,7 @@ func TestWalkAndHash(t *testing.T) {
 	require.NoError(t, err)
 	assert.Equal(t, h1, h2, "hash survives a rename")
 
-	_, err = walk(filepath.Join(root, "nope"), func(string) bool { return false }, nil)
+	_, err = walk(filepath.Join(root, "nope"), nil, func(string) bool { return false }, nil)
 	assert.Error(t, err)
 }
 
@@ -83,7 +83,7 @@ func TestWalkReportsIncrementalProgress(t *testing.T) {
 	}
 	var counts, folders []int
 	var paths []string
-	found, err := walk(root, func(rel string) bool { return rel == "b-album/skip.mp3" }, func(n, dirs int, path string) {
+	found, err := walk(root, nil, func(rel string) bool { return rel == "b-album/skip.mp3" }, func(n, dirs int, path string) {
 		counts, folders, paths = append(counts, n), append(folders, dirs), append(paths, path)
 	})
 	require.NoError(t, err)