Deletion of Relationship is proposed after peer deletion (#358)

* feat: incorporate comment

* test: deletion of previously active Relationship should be proposed after peer deletion

* fix: merge conflict within package-lock.json

* feat: use standard configuration of grace period for test

* fix: deformed package-lock.json

* refactor: reduce test to only contain necessary logic

* test: does not use global grace period setting

* fix: flaky test

* refactor: remove unused variable

* feat: incorporate Review comments

* feat: ensure Relationships to be existing

.dev/appsettings.override.json

@@ -20,6 +20,14 @@
         }
     },
     "Modules": {
+        "Announcements": {
+            "Infrastructure": {
+                "SqlDatabase": {
+                    "Provider": "Postgres",
+                    "ConnectionString": "User ID=announcements;Password=Passw0rd;Server=postgres;Port=5432;Database=enmeshed;"
+                }
+            }
+        },
         "Challenges": {
             "Infrastructure": {
                 "SqlDatabase": {

.dev/compose.backbone.env

@@ -1 +1 @@
-BACKBONE_VERSION=6.20.0
+BACKBONE_VERSION=6.22.0

.dev/compose.backbone.yml

@@ -124,6 +124,10 @@ services:
       Database__Provider: Postgres
       Database__ConnectionString: "Server=postgres;Database=enmeshed;User Id=devices;Password=Passw0rd;Port=5432"
 
+networks:
+  default:
+    name: backbone
+
 configs:
   Config:
     file: appsettings.override.json