Refresh Operating System Updates throws error

### What Happened?

I opened System Settings, clicked on System and noticed there was an update (expecting 8.1) and it said to reboot, so I did.
I logged back in and it was still 8.0 so I went back to System and it said 'Up to date, Last checked Dec 10' so I clicked Refresh. Nothing happened. I clicked it again, nothing happened.
I looked at syslog:

`2025-12-24T15:36:52.095177+08:00 ElementaryOS io.elementary.s[3438]: OperatingSystemView.vala:656: Failed to check for updates: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name io.elementary.settings-daemon was not provided by any .service files`

Should I just run a `sudo apt full-upgrade` to get to 8.1?

**Note:** I don't know if I'm on Wayland or X11. XDG_CURRENT_DESKTOP and GDMSESSION is Pantheon.
Also, I am not 'on the latest release' but I have run all the updates :)

### Steps to Reproduce

Open System Settings
Click on System
Click on Refresh
Nothing happens

### Expected Behavior

Refresh should check whether there are any new updates for the system. And at the very least, update the Last checked dialog.

### OS Version

8.x (Circe)

### OS Architecture

amd64 (on most hardwares)

### Session Type

Secure Session (Wayland, This is the default)

### Software Version

Latest release (I have run all updates)

### Log Output

```shell
2025-12-24T15:36:52.095177+08:00 ElementaryOS io.elementary.s[3438]: OperatingSystemView.vala:656: Failed to check for updates: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name io.elementary.settings-daemon was not provided by any .service files
```

### Hardware Info

AMD Ryzen 9 9900X 12-core
NVIDIA GeForce RTX 5050
32 Gb RAM
3 TB NVMe SSD