TMSS-770: Add date filtering interval in the remaining fiels of Cycle reporting; remove them from Project reporting and cleanup

TMSS-770: Update get_subs_and_durations_from_project by splitting SUBs in Prio A,B and switching to observed_durations

TMSS-857: Update distinction between successful/failed observations for the reporting (workflow flag)

TMSS-745: fixed inheritance for Meta class in various models. Otherwise base Meta properties (like constraints) are missed.

TMSS-745: pulled out common version number code for templates, and applied it to SchedulingUnitObservingStrategyTemplate as well.

TMSS-745: extract scheduling_constraints_doc and scheduling_constraints_template from submitted template and use it.

TMSS-745: handle trigger submission in one transaction. If anything fails, the whole trigger is discarded.