Read Performance Improvement - Using Native Query

Read Performance Improvement - Using Native Query

- Native query for FragmentExtracts
- Convert FragmentExtracts to tree of FragmentEntity
- Native Query now used for all Gets with descendants (orignal hibernate option only used when descendanst ommited)
- Added error handling for not-found on native query
- Ommit descendants by default on many udpate use-cases (this might have a signifcant perf. improvemnt impact too)
- Improved legacy tests for delete use-cases
- Corrected performace test expectation
- Fix TTL test realizing TTL resolution is whole seconds!

Issue-ID: CPS-1301
Signed-off-by: ToineSiebelink <toine.siebelink@est.tech>
Change-Id: I658ac1b7b7036f01050f30bdf9e5bd175725ef1d