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

SPECS.md

@@ -9,15 +9,16 @@ what has been changed, and what is still to do.
 
 ## Architecture: car server at car.k8s.stinnesbeck.com
 
-The car sends everything to our own server. The server stores it in InfluxDB 2 and forwards live
-telemetry to ABRP, so the ABRP token lives only on the server, never in the APK. Grafana reads
-InfluxDB directly for the dashboards.
+The car sends everything to our own server, which stores it in InfluxDB 2, and its live data
+straight to ABRP with the ABRP credentials kept (encrypted) in the app. The server does not talk
+to ABRP. Grafana reads InfluxDB directly for the dashboards.
 
 ```
-car ──live telemetry───▶ car.k8s.stinnesbeck.com (Go) ──▶ ABRP  api.iternio.com/1/tlm/send
-    ──daily chunks─────▶          │
-    ──charging sessions▶          ▼
-                              InfluxDB 2 ◀── Grafana (car-grafana.k8s.stinnesbeck.com)
+car ──live telemetry───▶ car.k8s.stinnesbeck.com (Go)
+ │  ──daily chunks─────▶          │
+ │  ──charging sessions▶          ▼
+ │                            InfluxDB 2 ◀── Grafana (car-grafana.k8s.stinnesbeck.com)
+ └──live telemetry─────▶ ABRP  api.iternio.com/1/tlm/send
 ```
 
 - **Server:** `server/`, Go 1.26, API only — see `server/README.md` for endpoints, configuration
@@ -112,6 +113,9 @@ tyre pressures, GPS (lat, lon, elevation, heading) and the is_* flags. It does *
   INGEST_TOKEN) into git and pushed it. Commit amended and force-pushed; both values regenerated in
   the now gitignored `k8s/secrets.yaml` (since moved to `k8s/secrets/secrets.yaml`, outside
   `kubectl apply -f k8s/`). Filled-in secrets live only there from now on.
+- 2026-10-18 — App 2.11.1, server 2.4.0: ABRP forwarding removed from the server. The car and the
+  server use the same mobile connection, so a server fallback for ABRP bought nothing. The car no
+  longer sends `abrpSentUtc`; the server ignores unknown fields, so older apps keep working.
 - 2026-10-18 — App 2.11.0, server 2.3.0:
   - Live data goes to ABRP straight from the car when ABRP credentials are set in the app
     (Live data tab or config file: `abrp_api_key`, `abrp_token`), so ABRP keeps getting it