fix(eventstore/mongodb): pass context with transaction to inTx handler

[klowdo]

Description

pass context with transaction to eventHandlerInTX

Affected Components

• Event Store, outbox

Related Issues

Solution and Design

passes the txCtx with transaction to handler instead of empty context

Steps to test and verify

In handler that is assigned WithEventHandlerInTX write this below and you should get no session without this fix

func (c *myHandler)  HandleEvent(ctx context.Context, e eh.Event) error{
  session := mongodb.SessionFromContext(ctx)
  if session  == nil {
    fmt.Println("no session")
  } else {
     fmt.Printf("session: %v", session.ID())
  }
}

[coveralls]

Coverage increased (+0.07%) to 68.813% when pulling 441b029 on klowdo:main into d9133a0 on looplab:main.