LGTM. The fix is small and targeted: deserialize_ignored_any no longer routes through deserialize_any, which was pulling the ignored field through the coercion path (Debezium ZonedTimestamp and friends) even when the destination table doesn't declare that column. visit_unit() is the right terminal for IgnoredAny — the underlying Value iterator advances at the map layer regardless.

Nice test coverage: test_debezium_ignored_coerced_field exercises the exact scenario (NULL in before, populated in after), and the unit test in deserializer.rs pins the low-level behavior with a nullable coerced ZonedTimestamp. Both would have caught the regression.

Confirmed this is the only deserialize_ignored_any impl under format/avro, so nothing else depends on the previous deserialize_any behavior. APPROVE.