fix: CI test failures on Windows

- TestVersionChangesCoverage: Add missing 3rd changelog entry for v0.25.1
- TestDefaultPath: Use filepath.Join for cross-platform path handling
- TestDebouncer_CancelWithNoPendingAction: Increase sleep from 60ms to 100ms
  to account for Windows timer imprecision

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

cmd/bd/daemon_debouncer_test.go

@@ -80,7 +80,8 @@ func TestDebouncer_CancelWithNoPendingAction(t *testing.T) {
 	debouncer.Cancel()
 
 	debouncer.Trigger()
-	time.Sleep(60 * time.Millisecond)
+	// Use longer wait to account for Windows timer imprecision
+	time.Sleep(100 * time.Millisecond)
 	if got := atomic.LoadInt32(&count); got != 1 {
 		t.Errorf("action should fire normally after cancel with no pending action: got %d, want 1", got)
 	}