[democracy] move proposal enaction to the start of assigning phase

[brenzi]

The current implementation enacts at the beginning of registering phase. This leads to inconsistent rewards if the proposal adjusts community issued income as some may claim early (during attesting) and others during registering (late claim).

Options:

• at start of registering.
  • con: see above: potentially inconsistent CII
• at start of assigning.
  • pro: allows swift adding of new locations (only if onCeremonyPhaseChange is executed before ceremony pallet where assignment happens: must be well documented). In emergencies, a proposal could be submitted and approved during a single registering phase and enacted for the same cycle)
  • con: none
• at start of attesting.
  • con: possible inconsistency if assigning had different rules than meetup evaluation

[brenzi]

@pifragile any considerations to add?

[pifragile]

seems legit @brenzi