fix(traffic): подтверждать идентичность соседних счётчиков

backend/src/db/schema.ts

@@ -310,6 +310,7 @@ export const flowAsnMeta = pgTable("flow_asn_meta", {
 })
 
 export const trafficSamples = pgTable("traffic_samples", {
+  nativeCounterIdentity: text("native_counter_identity"),
   serverId:      intPkRef().references(() => servers.id, { onDelete: "cascade" }),
   interfaceName: text("interface_name").notNull(),
   peerPublicKey: text("peer_public_key").notNull().default(""),

backend/src/db/traffic-flags.ts

@@ -2,11 +2,19 @@ export const TRAFFIC_FLAG_RUNNING = 1
 export const TRAFFIC_FLAG_DISABLED = 2
 export const TRAFFIC_FLAG_COUNTERS_KNOWN = 4
 export const TRAFFIC_FLAG_STATUS_KNOWN = 8
+export const TRAFFIC_FLAG_CONTINUITY_KNOWN = 16
+export const TRAFFIC_FLAG_CONTINUITY_RECORDED = 32
 
-export function encodeTrafficFlags(running: boolean, disabled: boolean, countersKnown = false, statusKnown = false): number {
+export function encodeTrafficFlags(running: boolean, disabled: boolean, countersKnown = false, statusKnown = false, continuityKnown?: boolean): number {
   return (running ? TRAFFIC_FLAG_RUNNING : 0) | (disabled ? TRAFFIC_FLAG_DISABLED : 0)
     | (countersKnown ? TRAFFIC_FLAG_COUNTERS_KNOWN : 0)
     | (statusKnown ? TRAFFIC_FLAG_STATUS_KNOWN : 0)
+    | (continuityKnown === undefined ? 0 : TRAFFIC_FLAG_CONTINUITY_RECORDED | (continuityKnown ? TRAFFIC_FLAG_CONTINUITY_KNOWN : 0))
+}
+
+/** Undefined retains the documented legacy boundary; new producers explicitly mark both outcomes. */
+export function trafficCounterContinuity(flags: number): boolean | undefined {
+  return flags & TRAFFIC_FLAG_CONTINUITY_RECORDED ? !!(flags & TRAFFIC_FLAG_CONTINUITY_KNOWN) : undefined
 }
 
 export function trafficFlagRunning(flags: number | null | undefined): boolean {