feat: improve legacy metadata and admin compatibility (#2202)

crates/filemeta/examples/dump_versions.rs

@@ -0,0 +1,24 @@
+use rustfs_filemeta::FileMeta;
+use std::{env, fs, path::PathBuf};
+
+fn main() {
+    let path = env::args()
+        .nth(1)
+        .map(PathBuf::from)
+        .expect("usage: dump_versions <xl.meta path>");
+
+    let data = fs::read(&path).expect("read xl.meta");
+    let meta = FileMeta::load(&data).expect("load xl.meta");
+    let versions = meta
+        .into_file_info_versions("debug-bucket", "debug-object", true)
+        .expect("decode versions");
+
+    println!("path: {}", path.display());
+    println!("versions: {}", versions.versions.len());
+    for (idx, version) in versions.versions.iter().enumerate() {
+        println!(
+            "#{idx}: version_id={:?} deleted={} mark_deleted={} is_latest={} size={} mod_time={:?}",
+            version.version_id, version.deleted, version.mark_deleted, version.is_latest, version.size, version.mod_time
+        );
+    }
+}