feat(metrics): add per-domain HTTP request rate metrics

ts/proxies/smart-proxy/models/metrics-types.ts

@@ -29,6 +29,11 @@ export interface IThroughputHistoryPoint {
   out: number;
 }
 
+export interface IRequestRateMetrics {
+  perSecond: number;
+  lastMinute: number;
+}
+
 /**
  * Main metrics interface with clean, grouped API
  */
@@ -81,6 +86,7 @@ export interface IMetrics {
     perSecond(): number;
     perMinute(): number;
     total(): number;
+    byDomain(): Map<string, IRequestRateMetrics>;
   };
   
   // Cumulative totals
@@ -185,4 +191,4 @@ export interface IByteTracker {
   bytesOut: number;
   startTime: number;
   lastUpdate: number;
-}
+}

ts/proxies/smart-proxy/models/rust-types.ts

@@ -134,6 +134,11 @@ export interface IRustBackendMetrics {
   h2Failures: number;
 }
 
+export interface IRustHttpDomainRequestMetrics {
+  requestsPerSecond: number;
+  requestsLastMinute: number;
+}
+
 export interface IRustMetricsSnapshot {
   activeConnections: number;
   totalConnections: number;
@@ -150,6 +155,7 @@ export interface IRustMetricsSnapshot {
   totalHttpRequests: number;
   httpRequestsPerSec: number;
   httpRequestsPerSecRecent: number;
+  httpDomainRequests: Record<string, IRustHttpDomainRequestMetrics>;
   activeUdpSessions: number;
   totalUdpSessions: number;
   totalDatagramsIn: number;

ts/proxies/smart-proxy/rust-metrics-adapter.ts

@@ -1,6 +1,6 @@
-import type { IMetrics, IBackendMetrics, IProtocolCacheEntry, IProtocolDistribution, IThroughputData, IThroughputHistoryPoint } from './models/metrics-types.js';
+import type { IMetrics, IBackendMetrics, IProtocolCacheEntry, IProtocolDistribution, IRequestRateMetrics, IThroughputData, IThroughputHistoryPoint } from './models/metrics-types.js';
 import type { RustProxyBridge } from './rust-proxy-bridge.js';
-import type { IRustBackendMetrics, IRustIpMetrics, IRustMetricsSnapshot, IRustRouteMetrics } from './models/rust-types.js';
+import type { IRustBackendMetrics, IRustHttpDomainRequestMetrics, IRustIpMetrics, IRustMetricsSnapshot, IRustRouteMetrics } from './models/rust-types.js';
 
 /**
  * Adapts Rust JSON metrics to the IMetrics interface.
@@ -219,6 +219,18 @@ export class RustMetricsAdapter implements IMetrics {
     total: (): number => {
       return this.cache?.totalHttpRequests ?? this.cache?.totalConnections ?? 0;
     },
+    byDomain: (): Map<string, IRequestRateMetrics> => {
+      const result = new Map<string, IRequestRateMetrics>();
+      if (this.cache?.httpDomainRequests) {
+        for (const [domain, metrics] of Object.entries(this.cache.httpDomainRequests) as Array<[string, IRustHttpDomainRequestMetrics]>) {
+          result.set(domain, {
+            perSecond: metrics.requestsPerSecond ?? 0,
+            lastMinute: metrics.requestsLastMinute ?? 0,
+          });
+        }
+      }
+      return result;
+    },
   };
 
   public totals = {