common: sort safetensor files to prevent illegal split error at loadi…

[adrianhoehne]

…ng model.

fixes(#25181)

Overview

When hf is set then the files of the specific folder are read in, this may happen unordered, so at the end the wrong safetensor file is given to the main logic and will cause an "illegal split file idx error.

This code just sorts the list by index before returning it to the caller.

Additional information

Requirements

It is reproduce and tested with the following configuration:

017.551 I srv          load: spawning server instance with args:
0.17.017.552 I srv          load:   /home/adrian/llama.cpp/build/bin/llama-server
0.17.017.553 I srv          load:   --cache-reuse
0.17.017.554 I srv          load:   256
0.17.017.555 I srv          load:   --host
0.17.017.556 I srv          load:   127.0.0.1
0.17.017.557 I srv          load:   --jinja
0.17.017.557 I srv          load:   --no-mmproj-auto
0.17.017.558 I srv          load:   --no-mmproj-offload
0.17.017.559 I srv          load:   --offline
0.17.017.560 I srv          load:   --port
0.17.017.561 I srv          load:   46073
0.17.017.561 I srv          load:   --tags
0.17.017.562 I srv          load:   qwen3next,coder-next
0.17.017.563 I srv          load:   --temperature
0.17.017.564 I srv          load:   0.2
0.17.017.564 I srv          load:   --alias
0.17.017.566 I srv          load:   qwen3-coder-next-q6k-default-llama
0.17.017.567 I srv          load:   --ctx-size
0.17.017.567 I srv          load:   131072
0.17.017.568 I srv          load:   --device
0.17.017.569 I srv          load:   CUDA0
0.17.017.570 I srv          load:   --flash-attn
0.17.017.570 I srv          load:   on
0.17.017.571 I srv          load:   --fit
0.17.017.572 I srv          load:   off
0.17.017.615 I srv          load:   --hf-repo
0.17.017.616 I srv          load:   unsloth/Qwen3-Coder-Next-GGUF
0.17.017.616 I srv          load:   --hf-file
0.17.017.618 I srv          load:   UD-Q6_K/Qwen3-Coder-Next-UD-Q6_K-00001-of-00003.gguf
0.17.017.619 I srv          load:   --kv-offload
0.17.017.619 I srv          load:   --main-gpu
0.17.017.620 I srv          load:   0
0.17.017.621 I srv          load:   --n-cpu-moe
0.17.017.622 I srv          load:   55
0.17.017.622 I srv          load:   --n-gpu-layers
0.17.017.623 I srv          load:   999
0.17.017.624 I srv          load:   --parallel
0.17.017.625 I srv          load:   1
0.17.017.625 I srv          load:   --reasoning
0.17.017.626 I srv          load:   off
0.17.017.627 I srv          load:   --split-mode
0.17.017.628 I srv          load:   none

• I have read and agree with the contributing guidelines
• AI usage disclosure: YES, to explain code, as this is not my main language.

[ngxson]

not 100% if this could be a duplicated code path, cc @angt if you can have a look