[repository] refactor and optimize '?1' relation handling * only skip auto remove if activeintegrity is explicitly disabled * do it even for inlined relation, so hooks are properly called * on entity creation, only cleanup what's needed

[session] deprecates schema_rproperty in favor of more optimized rtype_eids_rdef which return the rdef (so reusable to gather other data)

[repository] refactor/cleanup entity deletion methods * kill unused Repository.delete_info_multi (no leading _) * kill unnecessary system_source.delete_info (almost no benefit over delete_info_multi) * stop giving entities list *and* extid list, gather them from the entity when needed * move pending eids handling into glob_delete_entities, so one can call it directly without worrying about that

[repository] new hook selector according to configuration's repairing flag