feat(add-ons): Add legislative-summarization database to Postgres

Move legislative-summarization off its dedicated CNPG cluster onto the shared one, with its own role and database like authentik and grafana.

add-ons/postgres/legislative-database.yaml

@@ -0,0 +1,11 @@
+apiVersion: postgresql.cnpg.io/v1
+kind: Database
+metadata:
+  name: legislative
+  namespace: postgres
+spec:
+  cluster:
+    name: postgres
+  databaseReclaimPolicy: retain
+  name: legislative
+  owner: legislative