chore: Update dependencies and training notebook

* Bumped versions of `unsloth` to 2025.10.8 and `unsloth-zoo` to 2025.10.9 in `pyproject.toml` and `uv.lock`.
* Updated `transformers` version to 4.56.2 in both `pyproject.toml` and `uv.lock`.
* Modified the training notebook to change the base model from `Qwen/Qwen2.5-VL-7B-Instruct` to `Qwen/Qwen3-VL-8B-Instruct` and updated execution counts for consistency.

Author: bradhilton