Restructure the lecture series: point sources + formalism lectures, chaining into chapter 2, pixelizations as chapter 3, new Scaling Up Lensing chapter 4 #139

	name: Tutorials Complete

	# Guards against tutorial scripts being truncated / cut off mid-generation (a
	# long file re-emitted with the output severed, losing every section below the
	# cut). Each tutorial_*.py must end with a `__Wrap Up__` (or `__Summary__`)
	# terminal section; the check is pure-stdlib and needs no library install.
	# See scripts/check_tutorials_complete.py.

	# One run per commit: PR events carry the CI; pushes only build main
	# (Heart's ws_ci gate reads main-HEAD conclusions). Superseded runs are
	# cancelled on PR refs only — a cancelled main run would read as red CI
	# (cancelled is in Heart's FAILURE_CONCLUSIONS).
	on:
	push:
	branches: [main]
	pull_request:

	concurrency:
	group: tutorials_complete-${{ github.ref }}
	cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
	jobs:
	tutorials-complete:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v5
	with:
	python-version: "3.13"
	- name: Check tutorials are not truncated
	run: python .github/scripts/check_tutorials_complete.py .

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