Nice, looking forward to your contributions. Let me know if you'd like to discuss anything upfront. On a general note, have you considered to rely on the schema of change events themselves (inline JSON schema, or Avro schema in a registry)? Not all connectors provide the separate schema history topic, you won't have to parse DDL and the synchronization issue is avoided at all. Happy to discuss in more detail.

Disclaimer: I'm the Debezium lead.