v3.20.78

Changelog

• a325fac chore: bump version to v3.20.78 [skip-release] [skip ci]
• b2950b3 feat(core): SQL roles_query in union role mode
• 9c1192e feat(core): per-role read grants in sources mode
• 6357681 feat(core): union role mode and trusted $groups variable
• aebaff0 fix(dialect): in and nin with array variables on MySQL and MariaDB text columns
• 33cd5e6 fix(dialect): nin with an array variable on MongoDB
• 3b32e85 fix(qcode): reject role filters that compile to nothing
• 75795ad refactor(core): rename the groups variable to $user_groups