Improve error handling and logging in message processing

- Updated HandleMessage function to include the actual message content in error notices for invalid messages, enhancing clarity for debugging.
- Added nil check in Value method of tag encoder to prevent potential nil pointer dereference.
- Refactored tag handling in spider to utilize hex-encoded pubkeys for improved compatibility and clarity in filter creation.
- bump to v0.19.10

pkg/encoders/tag/tag.go

@@ -144,6 +144,7 @@ func (t *T) Key() (key []byte) {
 }
 
 func (t *T) Value() (key []byte) {
+	if t==nil {return}
 	if len(t.T) > Value {
 		return t.T[Value]
 	}