fix(traffic): сохранять точность объёмов и обозначать бинарные единицы

lib/traffic-observations.ts

@@ -5,7 +5,7 @@ const meta = z.object({ rxNow: z.boolean(), txNow: z.boolean(), rxSeries: z.arra
   sampledAt: timestamp, expiresAt: timestamp.optional(), lastAttemptAt: timestamp.optional(), lastSucceededAt: timestamp.optional(), error: z.string().nullable().optional(),
   currentState: z.enum(["current", "unknown", "pending", "error", "stale", "disabled"]).optional() })
 export type TrafficObservationMeta = z.infer<typeof meta>
-const metrics = z.object({ rxNow: rate, txNow: rate, rxPeak: rate, txPeak: rate, rxTotal: rate, txTotal: rate,
+const metrics = z.object({ volumeUnit: z.literal("GiB").optional(), rxNow: rate, txNow: rate, rxPeak: rate, txPeak: rate, rxTotal: rate, txTotal: rate,
   rxSeries: z.array(rate), txSeries: z.array(rate), observations: meta.optional() }).refine(r =>
     (!r.observations || r.observations.rxSeries.length === r.rxSeries.length && r.observations.txSeries.length === r.txSeries.length &&
       (!(r.observations.rxNow || r.observations.txNow || r.observations.rxSeries.some(Boolean) || r.observations.txSeries.some(Boolean)) || r.observations.sampledAt !== null)))
@@ -18,8 +18,8 @@ export function projectTrafficObservations(raw: unknown, now = Date.now()) {
   const current = !o?.currentState || o.currentState === "current"
   const rxSeries = r.rxSeries.map((v, i) => o?.rxSeries[i] ? v : null)
   const txSeries = r.txSeries.map((v, i) => o?.txSeries[i] ? v : null)
-  return { observations: o, rxNow: current && o?.rxNow ? r.rxNow : null, txNow: current && o?.txNow ? r.txNow : null,
+  return { observations: o, volumeUnit: r.volumeUnit, rxNow: current && o?.rxNow ? r.rxNow : null, txNow: current && o?.txNow ? r.txNow : null,
     rxSeries, txSeries, rxPeak: rxSeries.some(v => v !== null) ? r.rxPeak : null,
     txPeak: txSeries.some(v => v !== null) ? r.txPeak : null,
-    rxTotal: rxSeries.some(v => v !== null) ? r.rxTotal : null, txTotal: txSeries.some(v => v !== null) ? r.txTotal : null }
+    rxTotal: r.volumeUnit && rxSeries.some(v => v !== null) ? r.rxTotal : null, txTotal: r.volumeUnit && txSeries.some(v => v !== null) ? r.txTotal : null }
 }