feat(telemetry): implement retry attempt telemetry for network related retries (#22027)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

packages/core/src/tools/web-fetch.ts

@@ -27,12 +27,14 @@ import { convert } from 'html-to-text';
 import {
   logWebFetchFallbackAttempt,
   WebFetchFallbackAttemptEvent,
+  logNetworkRetryAttempt,
+  NetworkRetryAttemptEvent,
 } from '../telemetry/index.js';
 import { LlmRole } from '../telemetry/llmRole.js';
 import { WEB_FETCH_TOOL_NAME } from './tool-names.js';
 import { debugLogger } from '../utils/debugLogger.js';
 import { coreEvents } from '../utils/events.js';
-import { retryWithBackoff } from '../utils/retry.js';
+import { retryWithBackoff, getRetryErrorType } from '../utils/retry.js';
 import { WEB_FETCH_DEFINITION } from './definitions/coreTools.js';
 import { resolveToolDeclaration } from './definitions/resolver.js';
 import { LRUCache } from 'mnemonist';
@@ -188,13 +190,28 @@ class WebFetchToolInvocation extends BaseToolInvocation<
   }
 
   private handleRetry(attempt: number, error: unknown, delayMs: number): void {
+    const maxAttempts = this.config.getMaxAttempts();
+    const modelName = 'Web Fetch';
+    const errorType = getRetryErrorType(error);
+
     coreEvents.emitRetryAttempt({
       attempt,
-      maxAttempts: this.config.getMaxAttempts(),
+      maxAttempts,
       delayMs,
-      error: error instanceof Error ? error.message : String(error),
-      model: 'Web Fetch',
+      error: errorType,
+      model: modelName,
     });
+
+    logNetworkRetryAttempt(
+      this.config,
+      new NetworkRetryAttemptEvent(
+        attempt,
+        maxAttempts,
+        errorType,
+        delayMs,
+        modelName,
+      ),
+    );
   }
 
   private async executeFallback(signal: AbortSignal): Promise<ToolResult> {