I get wrong temperaure detection in v2.6.0

### Have you tried?

- yes I have

### Error output:
```text
none
```
---

### System information:

Add/paste output of:

```
$ sudo auto-cpufreq --debug

-------------------------------- Battery Info ---------------------------------

battery count = 1
BAT0 start threshold = b'70\n'
BAT0 stop threshold = b'85\n'

-------------------------------------------------------------------------------

Linux distro: Manjaro Linux 25.0.3 Zetar
Linux kernel: 6.12.32-1-MANJARO
Processor: AMD Ryzen 7 PRO 6850U with Radeon Graphics
Cores: 16
Architecture: x86_64
Driver: amd-pstate-epp

------------------------------ Current CPU stats ------------------------------

CPU max frequency: 2701 MHz
CPU min frequency: 400 MHz

Core Usage Temperature Frequency
CPU0 1.0% 36 °C 2643 MHz
CPU1 0.0% 36 °C 400 MHz
CPU2 0.0% 36 °C 400 MHz
CPU3 0.0% 36 °C 400 MHz
CPU4 0.0% 36 °C 2618 MHz
CPU5 0.0% 36 °C 2637 MHz
CPU6 1.0% 36 °C 2626 MHz
CPU7 0.0% 36 °C 400 MHz
CPU8 1.0% 36 °C 400 MHz
CPU9 0.0% 36 °C 400 MHz
CPU10 0.0% 36 °C 2648 MHz
CPU11 0.0% 36 °C 400 MHz
CPU12 0.0% 36 °C 2646 MHz
CPU13 0.0% 36 °C 2633 MHz
CPU14 0.0% 36 °C 2634 MHz
CPU15 0.0% 36 °C 400 MHz

CPU fan speed: 0 RPM

auto-cpufreq version: Version : 2.6.0-2

Python: 3.13.3
psutil package: 7.0.0
platform package: 1.0.8
click package: 8.1.8
distro package: 1.9.0

Computer type: Notebook
Battery is: charging

auto-cpufreq system resource consumption:
cpu usage: 0.0 %
memory use: 0.17 %

Total CPU usage: 0.6 %
Total system load: 0.88
Average temp. of all cores: 28.00 °C <== ?

Currently using: performance governor
Currently turbo boost is: off

-------------------------------------------------------------------------------
```
Only CPU0 is correctly detected, wich results in a wrong (too low) average temperature, see below.
Tried this with the v2.6.0 from AUR and with v2.6.0 installer.

$ auto-cpufreq --stats

In v2.5.0 temps are fine, see:
```
$ sudo auto-cpufreq --debug

-------------------------------- Battery Info ---------------------------------

battery count = 1
BAT0 start threshold = b'70\n'
BAT0 stop threshold = b'85\n'

-------------------------------------------------------------------------------

Linux distro: Manjaro Linux 25.0.3 Zetar
Linux kernel: 6.12.32-1-MANJARO
Processor: AMD Ryzen 7 PRO 6850U with Radeon Graphics
Cores: 16
Architecture: x86_64
Driver: amd-pstate-epp

------------------------------ Current CPU stats ------------------------------

CPU max frequency: 2701 MHz
CPU min frequency: 400 MHz

Core Usage Temperature Frequency
CPU0 1.0% 35 °C 400 MHz
CPU1 0.0% 35 °C 400 MHz
CPU2 1.0% 35 °C 400 MHz
CPU3 0.0% 35 °C 400 MHz
CPU4 0.0% 35 °C 400 MHz
CPU5 0.0% 35 °C 400 MHz
CPU6 0.0% 35 °C 2617 MHz
CPU7 1.0% 35 °C 2656 MHz
CPU8 0.0% 35 °C 400 MHz
CPU9 0.0% 35 °C 400 MHz
CPU10 1.0% 35 °C 2639 MHz
CPU11 0.0% 35 °C 400 MHz
CPU12 1.0% 35 °C 400 MHz
CPU13 0.0% 35 °C 400 MHz
CPU14 0.0% 35 °C 2636 MHz
CPU15 2.0% 35 °C 2670 MHz

CPU fan speed: 0 RPM

auto-cpufreq version: Version : 2.5.0-1

Python: 3.13.3
psutil package: 7.0.0
platform package: 1.0.8
click package: 8.1.8
distro package: 1.9.0

Computer type: Notebook
Battery is: charging

auto-cpufreq system resource consumption:
cpu usage: 0.0 %
memory use: 0.13 %

Total CPU usage: 0.7 %
Total system load: 0.08
Average temp. of all cores: 35.00 °C

Currently using: performance governor
Currently turbo boost is: off

---------------------------------------------------------------------------
```

```
$ auto-cpufreq --stats

-------------------------------- Battery Info ---------------------------------

battery count = 1
BAT0 start threshold = b'70\n'
BAT0 stop threshold = b'85\n'
Linux kernel: 6.12.32-1-MANJARO
Processor: AMD Ryzen 7 PRO 6850U with Radeon Graphics
Cores: 16
Architecture: x86_64
Driver: amd-pstate-epp

------------------------------ Current CPU stats ------------------------------

CPU max frequency: 2701 MHz
CPU min frequency: 400 MHz

Core Usage Temperature Frequency
CPU0 0.0% 36 °C 400 MHz
CPU1 0.0% 36 °C 400 MHz
CPU2 0.0% 36 °C 400 MHz
CPU3 0.0% 36 °C 400 MHz
CPU4 0.0% 36 °C 400 MHz
CPU5 0.0% 36 °C 2669 MHz
CPU6 1.0% 36 °C 400 MHz
CPU7 0.0% 36 °C 400 MHz
CPU8 0.0% 36 °C 400 MHz
CPU9 0.0% 36 °C 400 MHz
CPU10 0.0% 36 °C 2667 MHz
CPU11 2.0% 36 °C 400 MHz
CPU12 0.0% 36 °C 400 MHz
CPU13 0.0% 36 °C 400 MHz
CPU14 0.0% 36 °C 400 MHz
CPU15 0.0% 36 °C 2657 MHz

CPU fan speed: 0 RPM

---------------------------- CPU frequency scaling ----------------------------

Battery is: charging

Setting to use: "performance" governor
Setting to use: "performance" EPP
Not setting EPB (not supported by system)

Total CPU usage: 1.2 %
Total system load: 0.59
Average temp. of all cores: 36.00 °C

Load optimal (load average: 0.59, 0.44, 0.29)
Optimal total CPU usage: 1.2%, high average core temp: 36.0°C
Setting turbo boost: off

```

This may only be cosmetic, but I am not shure, have not stressed the notebook yet.

---

Start by reproducing the reported regression with `sudo auto-cpufreq --debug` and `auto-cpufreq --stats`, comparing v2.5.0 and v2.6.0 temperature output on Linux. The issue points to average/core temperature detection: done means all cores report the detected temperature consistently and the average is no longer too low.

Rédigé par le modèle d'indexation à partir du texte de l'issue.