feat: add long-running task support

mentioned in merge request uis/devops/devhub/lookup-gitlab-sync/faas!12 (closed)

mentioned in merge request uis/devops/iam/activate-account/entra-event-handler!11 (closed)

mentioned in merge request uis/devops/iam/activate-account/account-data-manager!2

mentioned in merge request uis/devops/infra/terraform/ucam-faas!30 (merged)

mentioned in merge request uis/devops/iam/activate-account/entra-event-handler!15 (closed)

mentioned in merge request uis/devops/iam/activate-account/entra-event-handler!26

mentioned in merge request uis/devops/devhub/lookup-gitlab-sync/faas!35

mentioned in merge request uis/devops/iam/ibis/institution-mapping-tool!13