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/src/lib/days.ts

@@ -0,0 +1,43 @@
+import type { ConsumptionChunk, DailyConsumption, Totals } from "./types.ts";
+
+/**
+ * Folds chunks into days, newest day first, each with its running lifetime total.
+ * Pure, so the arithmetic is tested without a database.
+ */
+export function aggregateDays(chunks: ConsumptionChunk[]): DailyConsumption[] {
+  const byDate = new Map<string, DailyConsumption & { sohAt: number }>();
+  for (const chunk of chunks) {
+    let day = byDate.get(chunk.date);
+    if (!day) {
+      day = {
+        installationId: chunk.installationId,
+        date: chunk.date,
+        recordedAt: chunk.recordedAt,
+        day: { km: 0, kwh: 0, hours: 0, socDrop: 0 },
+        sohAt: -Infinity,
+      };
+      byDate.set(chunk.date, day);
+    }
+    day.day.km += chunk.day.km;
+    day.day.kwh += chunk.day.kwh;
+    day.day.hours += chunk.day.hours;
+    day.day.socDrop += chunk.day.socDrop;
+    const at = chunk.recordedAt.getTime();
+    if (at > day.recordedAt.getTime()) day.recordedAt = chunk.recordedAt;
+    // The newest manual SoH of the day wins.
+    if (chunk.sohPercent !== undefined && at > day.sohAt) {
+      day.sohPercent = chunk.sohPercent;
+      day.sohAt = at;
+    }
+  }
+  const ascending = [...byDate.values()].sort((a, b) => a.date.localeCompare(b.date));
+  const running: Totals = { km: 0, kwh: 0, hours: 0, socDrop: 0 };
+  const days = ascending.map(({ sohAt: _sohAt, ...day }) => {
+    running.km += day.day.km;
+    running.kwh += day.day.kwh;
+    running.hours += day.day.hours;
+    running.socDrop += day.day.socDrop;
+    return { ...day, lifetime: { ...running } };
+  });
+  return days.reverse();
+}