Basic BE setup for contrast themes #170

Job	Run time
test-sqlite (3.11, Django>=5.0,<5.1, 1)	8m 11s
test-postgres (3.9, Django>=4.2,<4.3, psycopg2>=2.6, false, --parallel)	7m 31s
test-postgres-elasticsearch7 (3.9, Django>=4.2,<4.3, false)	7m 30s
test-sqlite (3.12, Django>=5.1,<5.2, emailuser, --parallel)	7m 55s
test-mysql (3.10, Django>=4.2,<4.3, false)	13m 38s
test-postgres (3.12, Django>=5.0,<5.1, psycopg>=3.1.8, postgres:15, notz, false, --parallel)	7m 49s
test-postgres (3.11, git+https://github.com/django/django.git@stable/5.1.x#egg=Django, psycopg>=3...	7m 50s
test-mysql (3.11, Django>=4.2,<4.3, false, mariadb:10.5)	13m 37s
test-sqlite-elasticsearch8 (3.12, Django>=5.1,<5.2, emailuser)	6m 42s
test-postgres (3.12, git+https://github.com/django/django.git@main#egg=Django, psycopg>=3.1.8, tr...	7m 53s
test-sqlite-opensearch2 (3.10, Django>=5.0,<5.1, false)	6m 30s
test-mysql (3.12, Django>=5.1,<5.2, false, mariadb:11.4, emailuser)	13m 36s
test-mysql (3.12, Django>=5.1,<5.2, false, --parallel, mysql:8.4, emailuser)	13m 21s
coverage	0s
	2h 2m 3s

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