fix: enforce max-keys limit to 1000 in S3 implementation (#549)

Co-authored-by: damon <damonxue2@gmail.com>

rustfs/src/storage/ecfs.rs

@@ -1230,6 +1230,7 @@ impl S3 for FS {
         let prefix = prefix.unwrap_or_default();
         let max_keys = match max_keys {
             Some(v) if v > 0 && v <= 1000 => v,
+            Some(v) if v > 1000 => 1000,
             None => 1000,
             _ => return Err(s3_error!(InvalidArgument, "max-keys must be between 1 and 1000")),
         };