chore: move the go code into a subfolder

apps/api/internal/v2/eventstore/event_store.go

@@ -0,0 +1,47 @@
+package eventstore
+
+import (
+	"context"
+
+	"github.com/shopspring/decimal"
+)
+
+func NewEventstore(querier Querier, pusher Pusher) *EventStore {
+	return &EventStore{
+		Pusher:  pusher,
+		Querier: querier,
+	}
+}
+
+func NewEventstoreFromOne(o one) *EventStore {
+	return NewEventstore(o, o)
+}
+
+type EventStore struct {
+	Pusher
+	Querier
+}
+
+type one interface {
+	Pusher
+	Querier
+}
+
+type healthier interface {
+	Health(ctx context.Context) error
+}
+
+type GlobalPosition struct {
+	Position        decimal.Decimal
+	InPositionOrder uint32
+}
+
+func (gp GlobalPosition) IsLess(other GlobalPosition) bool {
+	return gp.Position.LessThan(other.Position) || (gp.Position.Equal(other.Position) && gp.InPositionOrder < other.InPositionOrder)
+}
+
+type Reducer interface {
+	Reduce(events ...*StorageEvent) error
+}
+
+type Reduce func(events ...*StorageEvent) error