3302-crdb-nested-transaction-isolation.fixed.md

• CockroachDBTransactionSpec now declares an isolation level on the outer transaction that wraps updateAll(transaction="rollback"). Adobe ColdFusion rejects a nested cftransaction whose isolation level differs from its parent's, and the resulting exception escaped invokeWithTransaction before its catch could clear request.wheels.transactions, leaving the connection permanently marked as "transaction already open" — so every later model call in that request silently skipped its own transaction and OuterTransactionSignalSpec's rollback assertion failed as a knock-on (#3302)