test(artwork): make leak and permission tests pass on linux

goleak now ignores notify's nonrecursive-tree goroutines (linux uses
inotify, which spawns dispatch+internal instead of darwin's recursive
dispatch), and the read-only-dir prune spec skips under root, where
permission bits cannot make Remove fail.

core/artwork/artwork_suite_test.go

@@ -23,9 +23,11 @@ func TestArtwork(t *testing.T) {
 	// package's control, so they're ignored by exact top-function instead.
 	defer goleak.VerifyNone(t,
 		goleak.IgnoreTopFunction("github.com/onsi/ginkgo/v2/internal/interrupt_handler.(*InterruptHandler).registerForInterrupts.func2"),
-		// notify's own init() starts this dispatcher the moment it's imported
-		// (via core/storage/local or plugins); it never exits.
+		// notify's own init() starts a singleton tree the moment it's imported (via
+		// core/storage/local or plugins); recursive on darwin, nonrecursive on linux.
 		goleak.IgnoreTopFunction("github.com/rjeczalik/notify.(*recursiveTree).dispatch"),
+		goleak.IgnoreTopFunction("github.com/rjeczalik/notify.(*nonrecursiveTree).dispatch"),
+		goleak.IgnoreTopFunction("github.com/rjeczalik/notify.(*nonrecursiveTree).internal"),
 		// The old cache_warmer.go starts a goroutine per NewCacheWarmer call with
 		// no shutdown path (dark-launch target for Phase 2, not touched here).
 		goleak.IgnoreTopFunction("github.com/navidrome/navidrome/core/artwork.(*cacheWarmer).waitSignal"),

core/artwork/prune_test.go

@@ -189,6 +189,9 @@ var _ = Describe("Prune", func() {
 
 	It("warns and continues past a store.Remove failure instead of aborting the loop", func() {
 		tests.SkipOnWindows("uses Unix file permission bits")
+		if os.Geteuid() == 0 {
+			Skip("read-only dir cannot block root (e.g. tests in a container)")
+		}
 		old := time.Now().Add(-2 * time.Hour)
 
 		blocked := []byte("blocked-bytes")