fix: query result with hot tier (#908)

the default view for data is latest (recent) first. This requires
to send the reverse sorted order of hot tier file list for 
datafusion to process. 

This fixes the duplicate query results issue when server is 
configured with hot tier.

server/src/hottier.rs

@@ -409,6 +409,9 @@ impl HotTierManager {
             .get_stream_hot_tier_manifest_for_date(stream, &date)
             .await?;
         hot_tier_manifest.files.push(parquet_file.clone());
+        hot_tier_manifest
+            .files
+            .sort_by_key(|file| file.file_path.clone());
         // write the manifest file to the hot tier directory
         let manifest_path = self
             .hot_tier_path
@@ -501,14 +504,18 @@ impl HotTierManager {
                 .iter()
                 .any(|manifest_file| manifest_file.file_path.eq(&file.file_path))
         });
-        let remaining_files: Vec<File> = manifest_files
+        hot_tier_files.sort_unstable_by(|a, b| b.file_path.cmp(&a.file_path));
+
+        let mut remaining_files: Vec<File> = manifest_files
             .into_iter()
             .filter(|manifest_file| {
                 hot_tier_files
                     .iter()
                     .all(|file| !file.file_path.eq(&manifest_file.file_path))
             })
             .collect();
+        remaining_files.sort_unstable_by(|a, b| b.file_path.cmp(&a.file_path));
+
         Ok((hot_tier_files, remaining_files))
     }