feat(api): Return table ids from endpoints

[iambriccardo]

Summary

Adds a consistent table identity model across ETL API read responses.

• Returns { id, schema, name } for tables discovered from source and publication endpoints.
• Enriches selective table-copy configuration in pipeline read responses with table metadata.
• Adds flat id, schema, and name fields to replication table statuses.
• Preserves the legacy replication status fields table_id and table_name for backward compatibility and marks them as deprecated.
• Keeps publication write requests based on { schema, name }.
• Keeps selective table-copy requests based on table_ids.