providers/rac: fix AuthenticatedSession migration

[gergosimonyi]

This came up during trying (and failing, but shhh) to replicate #16303

Test by:

1. Connecting to a RAC instance on 2025.2.4
2. Upgrading

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.73%. Comparing base (ac8ed99) to head (274e0ed).
⚠️ Report is 20 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #16400      +/-   ##
==========================================
- Coverage   92.83%   92.73%   -0.11%     
==========================================
  Files         838      838              
  Lines       45290    45290              
==========================================
- Hits        42045    41999      -46     
- Misses       3245     3291      +46     

Flag	Coverage Δ
e2e	46.57% <ø> (-0.08%)	⬇️
integration	23.47% <ø> (-0.06%)	⬇️
unit	90.93% <ø> (+<0.01%)	⬆️

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[github-actions]

authentik PR Installation instructions

Instructions for docker-compose

Add the following block to your .env file:

AUTHENTIK_IMAGE=ghcr.io/goauthentik/dev-server
AUTHENTIK_TAG=gh-274e0edf89d6c3f95de46c97e969d11a80526821
AUTHENTIK_OUTPOSTS__CONTAINER_IMAGE_BASE=ghcr.io/goauthentik/dev-%(type)s:gh-%(build_hash)s

Afterwards, run the upgrade commands from the latest release notes.

Instructions for Kubernetes

Add the following block to your values.yml file:

authentik:
    outposts:
        container_image_base: ghcr.io/goauthentik/dev-%(type)s:gh-%(build_hash)s
global:
    image:
        repository: ghcr.io/goauthentik/dev-server
        tag: gh-274e0edf89d6c3f95de46c97e969d11a80526821

Afterwards, run the upgrade commands from the latest release notes.

[authentik-automation]

🍒 Cherry-pick to version-2025.6 created: #16418

[authentik-automation]

🍒 Cherry-pick to version-2025.4 created: #16417

[authentik-automation]

🍒 Cherry-pick to version-2025.8 created: #16419

[authentik-automation]

Cherry-pick to version-2025.8 already exists: #16419