feat(notifications): basic listener structure, notification record, delayed mechanism (#5432)

* feat: basic notification listener sturcuture

* feat: clean up generated gql

* chore: edited structure

* feat: added basic repo

* feat: ported comment email to job queue

* feat: ported stream access request accepted

* feat: added notification insertion

* fix: minor typings

* feat: delayed notifications

* updated types

* feat: fixed gql

* notifications are listed

* index on notifications

* feat: while loop skiping for update locked

* delayed notification for access request

* take into account user prefrences

* on comment view, notification is marked as read

* feat: added gql notifications

* feat: avoid raising errors

* fix: error added scopes

* fix: mr comments

* fix: cursor and service method

* feat: added stronger types to notifications and versioning logic

* minor: rows updated

utils/helm/speckle-server/templates/_helpers.tpl

@@ -613,6 +613,9 @@ Generate the environment variables for Speckle server and Speckle objects deploy
 - name: FF_NO_PERSONAL_EMAILS_ENABLED
   value: {{ .Values.featureFlags.noPersonalEmailsEnabled | quote }}
 
+- name: FF_NOTIFICATION_LISTENER_ENABLED
+  value: {{ .Values.featureFlags.notificationListenerEnabled | quote }}
+
 {{- if .Values.featureFlags.accIntegrationEnabled }}
 - name: AUTODESK_INTEGRATION_CLIENT_ID
   value: {{ .Values.server.accIntegration.client_id }}