fix: improve performance (#4300)

## Note

This release requires a setup step to fully improve performance.
Be sure to start ZITADEL with an appropriate command (zitadel start-from-init / start-from-setup)

## Changes

- fix: only run projection scheduler on active instances
- fix: set default for concurrent instances of projections to 1 (for scheduling)
- fix: create more indexes on eventstore.events table
- fix: get current sequence for token check (improve reread performance)

internal/eventstore/repository/search_query.go

@@ -85,6 +85,8 @@ const (
 	FieldEventType
 	//FieldEventData represents the event data field
 	FieldEventData
+	//FieldCreationDate represents the creation date field
+	FieldCreationDate
 
 	fieldCount
 )

internal/eventstore/repository/sql/crdb.go

@@ -297,6 +297,8 @@ func (db *CRDB) columnName(col repository.Field) string {
 		return "event_type"
 	case repository.FieldEventData:
 		return "event_data"
+	case repository.FieldCreationDate:
+		return "creation_date"
 	default:
 		return ""
 	}