- dataset invalidation uses utils suffix

- postpone data transformation when loaded server
- invalidate old interrupt split ingestions during stopIngestion script
- minor fix in data set increase version

erp5_wendelin_telecom_ingestion: minor fix in pending file metadata and logging references besides ids

- corresponding refactoring in check references, handle split, etc
- new permissions for contributor (delete)

- fix in ingestion ref exists handling restarted split ingestions

- ingestion reference now receives size and hash of file