Restore blob size fix (#5516)

* Revert "Revert "Fix gossip messages growing beyond blob size  (#5460)" (#5512)"

This reverts commit 97d57d168b.

* Fix Crds filters

core/src/packet.rs

@@ -335,7 +335,9 @@ pub fn to_blob<T: Serialize>(resp: T, rsp_addr: SocketAddr) -> Result<Blob> {
     let mut b = Blob::default();
     let v = bincode::serialize(&resp)?;
     let len = v.len();
-    assert!(len <= BLOB_SIZE);
+    if len > BLOB_SIZE {
+        return Err(Error::ToBlobError);
+    }
     b.data[..len].copy_from_slice(&v);
     b.meta.size = len;
     b.meta.set_addr(&rsp_addr);