fix(eventstore): use decimal, correct mirror (#9916)

# 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

internal/eventstore/local_postgres_test.go

@@ -2,12 +2,13 @@ package eventstore_test
 
 import (
 	"context"
-	"database/sql"
 	"encoding/json"
 	"os"
 	"testing"
 	"time"
 
+	pgxdecimal "github.com/jackc/pgx-shopspring-decimal"
+	"github.com/jackc/pgx/v5"
 	"github.com/jackc/pgx/v5/pgxpool"
 	"github.com/jackc/pgx/v5/stdlib"
 	"github.com/zitadel/logging"
@@ -40,7 +41,10 @@ func TestMain(m *testing.M) {
 		connConfig, err := pgxpool.ParseConfig(config.GetConnectionURL())
 		logging.OnError(err).Fatal("unable to parse db url")
 
-		connConfig.AfterConnect = new_es.RegisterEventstoreTypes
+		connConfig.AfterConnect = func(ctx context.Context, conn *pgx.Conn) error {
+			pgxdecimal.Register(conn.TypeMap())
+			return new_es.RegisterEventstoreTypes(ctx, conn)
+		}
 		pool, err := pgxpool.NewWithConfig(context.Background(), connConfig)
 		logging.OnError(err).Fatal("unable to create db pool")
 
@@ -101,10 +105,19 @@ func initDB(ctx context.Context, db *database.DB) error {
 }
 
 func connectLocalhost() (*database.DB, error) {
-	client, err := sql.Open("pgx", "postgresql://postgres@localhost:5432/postgres?sslmode=disable")
+	config, err := pgxpool.ParseConfig("postgresql://postgres@localhost:5432/postgres?sslmode=disable")
 	if err != nil {
 		return nil, err
 	}
+	config.AfterConnect = func(ctx context.Context, conn *pgx.Conn) error {
+		pgxdecimal.Register(conn.TypeMap())
+		return new_es.RegisterEventstoreTypes(ctx, conn)
+	}
+	pool, err := pgxpool.NewWithConfig(context.Background(), config)
+	if err != nil {
+		return nil, err
+	}
+	client := stdlib.OpenDBFromPool(pool)
 	if err = client.Ping(); err != nil {
 		return nil, err
 	}