hub-config: enable operator email alerts (operator_email + operator_enabled)

The dispatcher's operator path was gated off (processOperator returns
unless operatorOn && operatorEmail!=""), so the self-health pipeline
stopped one hop short of the inbox. Set the operator recipient
(admin@felhom.eu — the operator's own address, not a secret) and enable.
Config-only; no image bump.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0162BnMpUXscPsUB1cU8Tr6K

manifests/hub.yaml

@@ -85,6 +85,12 @@ data:
       # via the RESEND_API_KEY env var (see Deployment below). The Secret is created out-of-band
       # and is NOT committed — see documentation/runbooks/secrets.md. Leave this empty.
       resend_api_key: ""
+      # Operator alert recipient + enable. WITHOUT both, Dispatcher.processOperator returns early and
+      # NO operator email is ever sent — the self-health pipeline (probe→report→checker→dispatch) stops
+      # one hop short of the inbox (TESTRUN finding: the unproven hop). The address is the operator's own
+      # and is not a secret. from_email defaults to monitoring@felhom.eu.
+      operator_email: "admin@felhom.eu"
+      operator_enabled: true
     registry:
       image: "gitea.dooplex.hu/admin/felhom-controller"
       # username + token injected via REGISTRY_USERNAME / REGISTRY_TOKEN env vars