Set `begin_index` for flow-matching pipelines to avoid slow `index_for_timestep` #21694

	name: Run Torch dependency tests

	on:
	pull_request:
	branches:
	- main
	paths:
	- "src/diffusers/**.py"
	push:
	branches:
	- main

	concurrency:
	group: ${{ github.workflow }}-${{ github.head_ref \|\| github.run_id }}
	cancel-in-progress: true

	jobs:
	check_torch_dependencies:
	runs-on: ubuntu-22.04
	steps:
	- uses: actions/checkout@v6
	- name: Set up Python
	uses: actions/setup-python@v6
	with:
	python-version: "3.10"
	- name: Install dependencies
	run: \|
	pip install -e .
	pip install torch torchvision torchaudio pytest
	- name: Check for soft dependencies
	run: \|
	pytest tests/others/test_dependencies.py

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