chore: use entry in nippy code

crates/storage/provider/src/providers/snapshot/manager.rs

@@ -156,18 +156,19 @@ impl SnapshotProvider {
         tx_range: &RangeInclusive<u64>,
     ) -> ProviderResult<SnapshotJarProvider<'_>> {
         let key = (*block_range.end(), segment);
-        if let Some(jar) = self.map.get(&key) {
-            Ok(jar.into())
-        } else {
-            let path = self.path.join(segment.filename(block_range, tx_range));
-            let mut jar = NippyJar::load(&path)?;
-            if self.load_filters {
-                jar.load_filters()?;
+        let entry = match self.map.entry(key) {
+            dashmap::mapref::entry::Entry::Occupied(entry) => entry.into_ref(),
+            dashmap::mapref::entry::Entry::Vacant(entry) => {
+                let path = self.path.join(segment.filename(block_range, tx_range));
+                let mut jar = NippyJar::load(&path)?;
+                if self.load_filters {
+                    jar.load_filters()?;
+                }
+                let loaded_jar = LoadedJar::new(jar)?;
+                entry.insert(loaded_jar)
             }
-            let loaded_jar = LoadedJar::new(jar)?;
-            self.map.insert(key, loaded_jar);
-            Ok(self.map.get(&key).unwrap().into())
-        }
+        };
+        Ok(entry.downgrade().into())
     }
 
     /// Gets a snapshot segment's block range and transaction range from the provider inner block