Release 2025.8.0

See https://docs.goauthentik.io/docs/releases/2025.8

What's Changed

• website/docs: update Advanced Queries docs and Rel Notes with new Int Guide (cherry-pick #16191) by @tanberry in #16258
• website/docs: sys-mgmt/s3: Clean up and improve (cherry-pick #16242) by @tanberry in #16266
• security: Bump supported versions (cherry-pick #16261) by @rissson in #16267
• website/docs: update 2025.8 release notes (cherry-pick #16269) by @rissson in #16271
• tasks: add rel_obj to system task exception event (cherry-pick #16270) by @rissson in #16272

Full Changelog: version/2025.8.0-rc7...version/2025.8.0