Cerebrate v1.19 released with several usability / functionality fixes

v1.19 is a maintenance release with fixes and improvements mostly based on the feedback of the CSIRT-Network and ENISA.

Keycloak metafield sync fixed
Keycloak user modification/view issues when more than 100 users were enrolled due to a built in pagination limit in Keycloak
User enrollment fixes
Settings fixes
- Correctly handle the boolean settings such as debug
- Correctly display numeric settings
- Ensure that the settings are loaded correctly
Prevent the saving of an invalid key expiration (either for dates in the past or altogether invalid dates that were cast to indefinite expiration)
Group admin fixes
- Group admins can now properly enroll users for organisations other than their own that they manage
- Group admins can now modify organisation metadata for all of their managed organisations
- UI fixes to properly reflect what a group admin can do
- Pagination issues fixed across the board
  - hard limit of 100 elements /page relaxed

Encryption key improvements
- Reworked UI
- Fixes to the search interface (search by owner org or individual)
Various search improvements
- affected scopes include organisations, users, authentication keys
Backport and alignment of the MISP3 CRUD component