Add adapters, conformance harness, property tests, CI workflows, and … #1

	name: diagrams

	on:
	push:
	branches: [main]
	paths:
	- "docs/diagrams/**"
	pull_request:
	branches: [main]
	paths:
	- "docs/diagrams/**"

	jobs:
	drift-check:
	name: re-render and diff
	runs-on: ubuntu-24.04
	steps:
	- uses: actions/checkout@v4

	- name: Install Graphviz
	run: sudo apt-get update && sudo apt-get install -y graphviz

	- name: Record dot version
	run: dot -V

	- name: Re-render SVGs
	run: make -C docs/diagrams clean all

	- name: Diff against committed SVGs
	run: \|
	if ! git diff --exit-code docs/diagrams/*.svg; then
	echo "::error::Committed SVGs differ from a fresh dot render."
	echo "Run 'make -C docs/diagrams' locally and commit the result."
	exit 1
	fi

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