Minimum reproducible example for spring framework issue Propagate CoroutineContext in reactive transaction.

Test cases:

• Create example entity - PASSES
• Create example entity in @Transaction - FAILS
• Create example entity in TransactionalOperator - FAILS

The failures are due to the coroutine context assertion performed in ExampleService.

How to run:

1. docker compose up -d (simple postgres database)
2. ./gradlew test