Move debug logs to directory per day

This makes it easier to find stuff.

banks2ff/src/debug.rs

@@ -33,7 +33,8 @@ impl Middleware for DebugLogger {
         let timestamp = Utc::now().format("%Y%m%d_%H%M%S");
         let filename = format!("{}_{}_{}.txt", timestamp, request_id, self.service_name);
 
-        let dir = format!("./debug_logs/{}", self.service_name);
+        let date = Utc::now().format("%Y-%m-%d").to_string();
+        let dir = format!("./debug_logs/{}/{}", date, self.service_name);
         fs::create_dir_all(&dir).unwrap_or_else(|e| {
             eprintln!("Failed to create debug log directory: {}", e);
         });