Callbacks service docs updated

api/edge/bff/internal/server/callbacksimp/service.go

@@ -5,6 +5,7 @@ import (
 
 	api "github.com/tech/sendico/pkg/api/http"
 	"github.com/tech/sendico/pkg/db/callbacks"
+	"github.com/tech/sendico/pkg/db/transaction"
 	"github.com/tech/sendico/pkg/merrors"
 	"github.com/tech/sendico/pkg/model"
 	"github.com/tech/sendico/pkg/mservice"
@@ -16,6 +17,7 @@ import (
 type CallbacksAPI struct {
 	papitemplate.ProtectedAPI[model.Callback]
 	db      callbacks.DB
+	tf      transaction.Factory
 	secrets signingSecretManager
 	config  callbacksConfig
 }
@@ -35,6 +37,7 @@ func CreateAPI(apiCtx eapi.API) (*CallbacksAPI, error) {
 
 	res := &CallbacksAPI{
 		config: newCallbacksConfig(apiCtx.Config().Callbacks),
+		tf:     apiCtx.DBFactory().TransactionFactory(),
 	}
 
 	p, err := papitemplate.CreateAPI(apiCtx, dbFactory, mservice.Organizations, mservice.Callbacks)