T-604: Event Daily missions

Issue Details

Platform:PC

Context:

Doing daily event missions. Missions that appear alongside events. For example, while there is an ongoing event, a daily mission for monday is "Gather a Key Fragment" and it grants 5 Lunar Souls. These missions are supposed to be unique and themed after the daily bonus. If a world instance generated on monday stays generated past the daily reset for tuesday (and days past that) every user that logs into that world will have the quest for Lunar souls again.

Expected:

To get the correct daily event mission.

Reproduce:

- While there is an event (and daily event missions are present), go to a world of any kind (Account A)
- Make sure Account A doesn't disconnect from the world; keeping the world instance loaded through at least 1 daily reset
- Before the daily reset for the next day is supposed to happen go to the world with Account B
- Log of Account B and wait until daily reset had happened
- Log onto Account B and observe you got the same daily event mission as if it was still the same day the world instance was generated

Notes: the bug can be reproduced using 1 account as well, but might require tighter timings.
Same bug is responsible for event packs not being visible in the store if the world instance a player is in was generated on a day before before the event started.