refactor: Improve compression status and engine selection logic

Co-authored-by: aider (openai/andrew/openrouter/sonoma-sky-alpha) <aider@aider.chat>

src/compression_engine/none.rs

@@ -16,6 +16,14 @@ impl CompressionEngineNone {
 }
 
 impl CompressionEngine for CompressionEngineNone {
+    fn is_supported(&self) -> bool {
+        true
+    }
+
+    fn get_status_info(&self) -> (String, String, String) {
+        ("<INTERNAL>".to_string(), "".to_string(), "".to_string())
+    }
+
     fn size(&self, file_path: PathBuf) -> Result<usize> {
         let item_file_metadata = file_path.metadata()?;
         Ok(item_file_metadata.len() as usize)
@@ -27,7 +35,7 @@ impl CompressionEngine for CompressionEngineNone {
     }
 
     fn create(&self, file_path: PathBuf) -> Result<Box<dyn Write>> {
-        debug!("COMPRESSION: Writting to {:?} using {:?}", file_path, *self);
+        debug!("COMPRESSION: Writing to {:?} using {:?}", file_path, *self);
         Ok(Box::new(File::create(file_path)?))
     }
 }