fix: fix typos and improve error handling in compression engines

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

src/compression_engine/lz4.rs

@@ -27,7 +27,7 @@ impl CompressionEngine for CompressionEngineLZ4 {
     }
 
     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);
 
         let file = File::create(file_path)?;
         let lz4_write = FrameEncoder::new(file).auto_finish();