5.0.0-JF12-beta

Jellyfin 12.0 (.NET 10) beta 5.0.0-JF12-beta (plugin version 5.0.0.20).
Install via the beta repository URL (a Jellyfin 12.0 server picks this build automatically by targetAbi):
https://raw.githubusercontent.com/iderex/jellyfin-plugin-sso/manifest-beta/manifest.json

What's Changed

• Test config XML lifecycle round-trip (#192) by @iderex in #635
• Test [Authorize]-policy enforcement end-to-end (#192) by @iderex in #636
• Test fake-IdP OIDC challenge->callback->auth round-trip (#192) by @iderex in #637
• Record the manual release-QA checklist (#192) by @iderex in #638
• Explicit deny in AssertCanUpdateUser on a null auth context (#626) by @iderex in #641
• Fix .NET CI startup_failure on 4.2 (reusable build.yml permissions) by @iderex in #643

Full Changelog: 5.0.0-JF12-beta.19...5.0.0-JF12-beta.20