BE: Spoiler support

[danctila]

Assumptions:

• There is frontend support for spoilers with...
  • Components / detail pages that have individual spoiler toggles over wether spoilers show in the feed
  • User onboarding captures "global" spoiler indication for profile settings
  • User settings have a spoiler toggle

For backend support we need:

• Database support for spoiler indication on both post types
• Database support for user specified "global override" setting for being okay/not okay with spoilers
  • If a user has their preference as "see spoilers" have posts by default render with spoilers -> and vice versa