feat: add decidim-app RC 0.31 + fix demo env #547

Job	Run time
generate-matrix	3s
run-dbt-tests (projects/app_dev_k8s)	37s
run-dbt-tests (projects/toulouse)	37s
run-dbt-tests (projects/malakoff)	1s
run-dbt-tests (projects/sytral)	1s
run-dbt-tests (projects/arcueil)	25s
run-dbt-tests (projects/nice)	1s
run-dbt-tests (projects/chambery)	38s
run-dbt-tests (projects/rc031)	23s
run-dbt-tests (projects/brandenburg)	37s
run-dbt-tests (projects/marseille)	37s
run-dbt-tests (projects/tours)	38s
run-dbt-tests (projects/cultuur_connect)	38s
run-dbt-tests (projects/bagneux)	38s
run-dbt-tests (projects/ps_belge)	37s
run-dbt-tests (projects/cese)	37s
run-dbt-tests (projects/real_deal)	38s
run-dbt-tests (projects/plaine_commune)	37s
run-dbt-tests (projects/loire_atlantique)	26s
run-dbt-tests (projects/nanterre)	37s
run-dbt-tests (projects/meyzieu)	37s
run-dbt-tests (projects/grand_poitiers)	38s
run-dbt-tests (projects/cachan)	39s
run-dbt-tests (projects/valbonne)	1s
run-dbt-tests (projects/decidim_0_29_multilang)	1s
run-dbt-tests (projects/mel)	1s
run-dbt-tests (projects/montpellier)	26s
run-dbt-tests (projects/grand_nancy)	1s
run-dbt-tests (projects/colombes)	38s
run-dbt-tests (projects/casa)	37s
run-dbt-tests (projects/villeurbanne)	26s
run-dbt-tests (projects/nets4dem)	1s
run-dbt-tests (projects/thionville)	37s
run-dbt-tests (projects/angers)	1s
run-dbt-tests (projects/lyon)	1s
run-dbt-tests (projects/cour_des_comptes)	1s
	14m 12s

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