Server 2.4.0, app 2.11.1: ABRP forwarding removed from the server

The car sends live data to ABRP itself, and the car and the server go
over the same mobile connection: when the car cannot reach ABRP, it
cannot reach the server either, so the server's fallback bought
nothing. The forwarder, its ABRP_* settings and abrpSentUtc are gone;
the server only stores. The app stops sending abrpSentUtc (the server
ignores unknown fields, so 2.11.0 keeps working) and its texts no longer
promise a server fallback.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QLJfZQZeAKAwSqViTmLzki

k8s/README.md

@@ -22,7 +22,7 @@ is applied automatically. Apply them yourself.
    covered by Traefik's default certificate.
 2. **Create the Secrets.** `cp k8s/secrets/secrets.example.yaml k8s/secrets/secrets.yaml` (gitignored), replace
    every `CHANGE-ME` there (`openssl rand -hex 32`): `influxdb-auth`, `mg4-server` (ingest token,
-   approval password for pairing, your ABRP API key and user token), `grafana-admin` and
+   approval password for pairing), `grafana-admin` and
    `grafana-influx` (see below). Keep the template itself on placeholders only.
 3. **Registry access.** The `mg4-server` package on git.stinnesbeck.com is public, so no pull
    secret is needed. If you make it private, add an `imagePullSecrets` entry to `server.yaml`.