docs: record post-reboot environment and GPU verification

Deployment 45.20261105 booted (kernel 7.2.15-ogc1.1.fc45). Operator nvidia-smi
confirms the RTX 5070 Ti renders the Wayland session on driver 615.78.08;
vulkaninfo loads instance 1.4.350 but the physical-device line was not captured.
Tooling gaps after the update are listed as current state.

Docs/toolchain.md

@@ -8,8 +8,8 @@ Audited 2026-11-06 on the development workstation.
 
 | Component | Pinned | Source | Status |
 | --- | --- | --- | --- |
-| Bazzite | `44.20261026` (Kinoite, `bazzite-dx-nvidia`) | `ujust update` / `rpm-ostree upgrade` | Running. `45.20261105` staged, reboot pending. |
-| NVIDIA driver | `615.78.08`, open kernel module | Bazzite image | Loaded as kernel module. Desktop-session `nvidia-smi` / Vulkan check still pending, see [environment.md](environment.md). |
+| Bazzite | `45.20261105` (Kinoite, `bazzite-dx-nvidia`), kernel `7.2.15-ogc1.1.fc45` | `ujust update` / `rpm-ostree upgrade` | Booted and default. `44.20261026` retained as rollback. |
+| NVIDIA driver | `615.78.08`, open kernel module | Bazzite image | Verified: desktop session renders through the RTX 5070 Ti; Vulkan instance 1.4.350. Vulkan device-name capture still pending, see [environment.md](environment.md). |
 | Unreal Engine | `5.8.x` — pin one exact build | Epic (license required) | Not installed. |
 | Unreal Linux toolchain | engine-bundled clang | Engine source tree | Not installed. Do not substitute the system compiler. |
 | Blender | `5.2` LTS (upstream patch `5.2.3`) | Flatpak `org.blender.Blender` | Installed. |