[R hooks] optmize insertion by using direct repository methods when possible

[F schema] set inlined=False to ensure it'is not inlined by accident

[R querier] new READ_ONLY_RTYPES constant

[F repo debugging] log repo event on DBG_REPO debug level

[R schema hooks] use new accessors on CWRelation and CWAttribute entities

[R schema] dont give an iterator, it's a trap

[C schema seria] cleanup

[R repo, schema] use VIRTUAL_RTYPES const

[F server test] sort for test predictability

[R schemaobjs] property accessors for CWRelation/CWAttribute

F: start to handle binary debug log level on the server side

rewrite migrscheam

C remove no more used copy_schema

[D server test] remove deprecated test on application_hooks file, and associated data

backport stable branch

[F schema serial] #344876: missing some 'is'/'is_instance_of' relation for newly created instances