fix(eventstore): use decimal, correct mirror (#9914)

# Eventstore fixes

- `event.Position` used float64 before which can lead to [precision
loss](https://github.com/golang/go/issues/47300). The type got replaced
by [a type without precision
loss](https://github.com/jackc/pgx-shopspring-decimal)
- the handler reported the wrong error if the current state was updated
and therefore took longer to retry failed events.

# Mirror fixes

- max age of auth requests can be configured to speed up copying data
from `auth.auth_requests` table. Auth requests last updated before the
set age will be ignored. Default is 1 month
- notification projections are skipped because notifications should be
sent by the source system. The projections are set to the latest
position
- ensure that mirror can be executed multiple times

---------

Co-authored-by: Livio Spring <livio.a@gmail.com>

internal/v2/system/mirror/succeeded.go

@@ -1,6 +1,8 @@
 package mirror
 
 import (
+	"github.com/shopspring/decimal"
+
 	"github.com/zitadel/zitadel/internal/v2/eventstore"
 	"github.com/zitadel/zitadel/internal/zerrors"
 )
@@ -9,7 +11,7 @@ type succeededPayload struct {
 	// Source is the name of the database data are mirrored from
 	Source string `json:"source"`
 	// Position until data will be mirrored
-	Position float64 `json:"position"`
+	Position decimal.Decimal `json:"position"`
 }
 
 const SucceededType = eventTypePrefix + "succeeded"
@@ -38,7 +40,7 @@ func SucceededEventFromStorage(event *eventstore.StorageEvent) (e *SucceededEven
 	}, nil
 }
 
-func NewSucceededCommand(source string, position float64) *eventstore.Command {
+func NewSucceededCommand(source string, position decimal.Decimal) *eventstore.Command {
 	return &eventstore.Command{
 		Action: eventstore.Action[any]{
 			Creator:  Creator,