XFS: espaço livre por AG e arquivos apagados (extents sobrando no inode livre + nome da entrada liberada)

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

crates/guara-core/src/scan.rs

@@ -148,6 +148,7 @@ pub fn run(
                     FsKind::Ext => Some(fs::ext::scan(&mut ctx, p.start, p.len)),
                     FsKind::HfsPlus => Some(fs::hfsplus::scan(&mut ctx, p.start, p.len)),
                     FsKind::Btrfs => Some(fs::btrfs::scan(&mut ctx, p.start, p.len)),
+                    FsKind::Xfs => Some(fs::xfs::scan(&mut ctx, p.start, p.len)),
                     _ => None,
                 };
                 let _ = progress_phase;