fix(eventstore): use decimal, correct mirror (#9905)

back port #9812, #9878, #9881, #9884

---------

Co-authored-by: Livio Spring <livio.a@gmail.com>
Co-authored-by: Stefan Benz <46600784+stebenz@users.noreply.github.com>

internal/eventstore/handler/v2/statement.go

@@ -9,6 +9,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/shopspring/decimal"
 	"github.com/zitadel/logging"
 	"golang.org/x/exp/constraints"
 
@@ -82,7 +83,7 @@ func (h *Handler) reduce(event eventstore.Event) (*Statement, error) {
 type Statement struct {
 	Aggregate    *eventstore.Aggregate
 	Sequence     uint64
-	Position     float64
+	Position     decimal.Decimal
 	CreationDate time.Time
 
 	offset uint32