fix: CP-1086 Specify latest timestamp (vs nil) when retrieving latest ingredient revision

[samueld-activator]

CP-1086 Error when retrieving some ingredients from project failures

[Naatan]

Suggested change

	fixed := make(map[strfmt.UUID]bool)
	for _, artifact := range failedArtifacts {
	latest, err := model.FetchLatestRevisionTimeStamp(auth)
	if err != nil {
	return nil, fmt.Errorf("Failed to fetch latest timestamp: %w", err)
	}
	fixed := make(map[strfmt.UUID]bool)
	latest, err := model.FetchLatestRevisionTimeStamp(auth)
	if err != nil {
	return nil, fmt.Errorf("Failed to fetch latest timestamp: %w", err)
	}
	for _, artifact := range failedArtifacts {

Avoid doing API calls within a for loop if not needed.