refactor: logging instead of panic on removing tmp files fails

Signed-off-by: bsbds <[email protected]>

crates/curp/src/server/storage/wal/pipeline.rs

@@ -36,7 +36,9 @@ pub(super) struct FilePipeline {
 impl FilePipeline {
     /// Creates a new `FilePipeline`
     pub(super) fn new(dir: PathBuf, file_size: u64) -> io::Result<Self> {
-        Self::clean_up(&dir)?;
+        if let Err(e) = Self::clean_up(&dir) {
+            error!("Failed to clean up tmp files: {e}");
+        }
 
         let (file_tx, file_rx) = flume::bounded(1);
         let dir_c = dir.clone();