refactor(http): add a handleResponse hook (#45449)

As part of follow-up changes, we'll want to check the response's
headers, which requires we have an additional hook that we can use.

By default, this is a no-op.

Co-authored-by: Claude Opus 5 <jamie.tanna+claude-code@mend.io>

Author: jamietanna

lib/util/http/http.ts

@@ -242,6 +242,8 @@ export abstract class HttpBase<
       const resCopy = copyResponse(res, deepCopyNeeded);
       resCopy.authorization = !!options?.headers?.authorization;
 
+      this.handleResponse(resolvedUrl, resCopy);
+
       if (cacheProvider) {
         return await cacheProvider.wrapServerResponse(method, url, resCopy);
       }
@@ -294,6 +296,10 @@ export abstract class HttpBase<
     throw err;
   }
 
+  protected handleResponse(_url: URL, _res: HttpResponse<unknown>): void {
+    // noop
+  }
+
   resolveUrl(requestUrl: string | URL, options?: HttpOptions): URL {
     let url = requestUrl;