feat(ahm): add HealingTracker support & complete fresh-disk healing

• Introduce ecstore HealingTracker into ahm crate; load/init/save tracker
• Re-implement heal_fresh_disk to use heal_erasure_set with tracker
• Enhance auto-disk scanner: detect unformatted disks via get_disk_id()
• Remove DataUsageCache handling for now
• Refactor imports & types, clean up duplicate constants

crates/ahm/src/heal/progress.rs

@@ -66,7 +66,8 @@ impl HealProgress {
     }
 
     pub fn is_completed(&self) -> bool {
-        self.progress_percentage >= 100.0 || self.objects_scanned > 0 && self.objects_healed + self.objects_failed >= self.objects_scanned
+        self.progress_percentage >= 100.0
+            || self.objects_scanned > 0 && self.objects_healed + self.objects_failed >= self.objects_scanned
     }
 
     pub fn get_success_rate(&self) -> f64 {
@@ -97,6 +98,12 @@ pub struct HealStatistics {
     pub last_update_time: SystemTime,
 }
 
+impl Default for HealStatistics {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl HealStatistics {
     pub fn new() -> Self {
         Self {
@@ -138,4 +145,4 @@ impl HealStatistics {
             0.0
         }
     }
-} 
+}