authentik: Release 2021.4.3

## Headline Changes - Configurable Policy engine mode In the past, all objects, which could have policies attached to them, required *all* policies to pass to consider an action successful. You can now configure if *all* policies need to pass, or if *any* policy needs to pass. This can now be configured for the following objects: - Applications (access restrictions) - Sources - Flows - Flow-stage bindings For backwards compatibility, this is set to *all*, but new objects will default to *any*. - Expiring Events Previously, events would stay in the database forever, and had to eventually be cleaned up manually. This version add expiry to events with a default timeout of 1 Year. This also applies to existing events, and their expiry will be set during the migration. - New UI While the UI mostly looks the same, under the hood a lot has changed. The Web UI is now a Single-page application based on rollup and lit-html. This has several consequences and new features, for example: - You can now see a user's OAuth Access/Refresh tokens and the consents they've given - You can now see a per-object changelog based on the model_create/update/delete events being created. - A new API Browser is available under `https://authentink.company/api/v2beta/` - Several new charts, new pages and quality-of-life improvements - Credentials of objects are no longer shown while editing them - Deprecated Group membership has been removed. ## Minor changes - You can now specify the amount of processes started in docker-compose using the `WORKERS` environment variable. ## Fixed in 2021.4.3 - *: add model_name to TypeCreate API to distinguish between models sharing a component - api: fix CSRF error when using POST/PATCH/PUT in API Browser - api: make 401 messages clearer - api: mount outposts under outposts/instances to match flows - core: add parameter to output property mapping test result formatted - core: add superuser_full_list to applications list, shows all applications when superuser - core: fix Tokens being created with incorrect intent by default - outposts: don't run outpost_controller when no service connection is set - providers/oauth2: Set CORS Headers for token endpoint, check Origin header against redirect URLs - root: auto-migrate on startup, lock database using pg_advisory_lock - sources/oauth: add login with plex support - sources/oauth: fix redirect loop for source with non-configurable URLs - sources/oauth: save null instead of empty string for sources without configurable URLs - web/admin: add ability to add users to a group whilst creating a group - web/admin: fix default for codemirror - web/admin: fix group member table order - web/admin: fix non-matching provider type being selected when creating an OAuth Source - web/admin: fix provider type resetting when changing provider type - web/admin: fix undefined being shown when viewing application - web/admin: improve default selection for property-mappings See https://goauthentik.io/docs/releases/2021.4#fixed-in-202143