Server: InfluxDB 2 storage, live telemetry endpoint, ABRP forwarder

- MongoDB replaced by InfluxDB 2 (one bucket, installationId tag).
  Consumption is stored per chunk at its recordedAt and summed on read,
  so a chunk the car re-sends from its cache overwrites itself instead
  of being counted twice ($inc did count it twice). Lifetime is a
  running total derived on read.
- POST /v1/telemetry takes batches of samples in ABRP's tlm fields; every
  field is bounded, unknown fields are dropped, unread signals stay absent.
- After a successful write the newest fresh sample is forwarded to ABRP
  with ABRP_API_KEY / ABRP_USER_TOKEN from the server environment; rate
  limited, never queued. The car no longer needs ABRP credentials.
- Self-hosting: standalone output, Dockerfile (tests run in the build,
  runs as UID 10001), .env.example and README for the new setup.
- Dev shell gains Node 22 and InfluxDB 2.

Verified locally against InfluxDB 2.7.12: all endpoints, retry
idempotency, and the dashboard pages. Unit tests: 17 pass.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/package.json

@@ -13,7 +13,7 @@
     "node": ">=22"
   },
   "dependencies": {
-    "mongodb": "^6.20.0",
+    "@influxdata/influxdb-client": "^1.35.0",
     "next": "^15.5.4",
     "react": "^19.1.0",
     "react-dom": "^19.1.0"
@@ -24,4 +24,4 @@
     "typescript": "^5.8.3"
   },
   "type": "module"
-}
+}