* fix(eventstore): consider `IsGlobal`-flag of constraints
* fix(setup): set `instance_domain`-constraint global
(cherry picked from commit 60ee2610f2ae67e2e33ac8c08df739c44d397809)
* fix(eventstore): differentiate unique constraint error format
* docs: add comment to eventstore vars
* fix(eventstore): return correct error type if unique constraint already exists
This implementation increases parallel write capabilities of the eventstore.
Please have a look at the technical advisories: [05](https://zitadel.com/docs/support/advisory/a10005) and [06](https://zitadel.com/docs/support/advisory/a10006).
The implementation of eventstore.push is rewritten and stored events are migrated to a new table `eventstore.events2`.
If you are using cockroach: make sure that the database user of ZITADEL has `VIEWACTIVITY` grant. This is used to query events.
