Description

For now, the symfony/orm-pack locks doctrine/dbal to version 3 because Symfony relies on the deprecated schema extension events that have been removed in dbal 4.

The events are used in MessengerTransportDoctrineSchemaListener (in the end to add a postgres notifier for symfony/messenger).

Typo3 replaces the platform driver to use custom extended platform implementations that can add to the schema. I do not yet see where exactly we could do that for the notifier - the typo3 changes e.g. in PostgreSQLSchemaManager are to tweak how columns are defined. for the notifier, we need to add completely custom SQL outside of the table definition.

Before i dig deeper, i wanted to ask for input on this, opinions or pointers where this should happen, and where in symfony we should replace the classes.

Notes:

• MessengerTransportDoctrineSchemaListener (and its test) is the only place in all of symfony/symfony in the 7.1 branch that mentions any DBAL\Event things. fixing this one place will be enough.