fix(proxy): modify the registration of the axios interceptors (#1791)

The previous way of adding Axios interceptors added a new interceptor each time, causing lags after
a while because of all the duplicate interceptors added.

fix #1787

server/api/externalapi.ts

@@ -1,3 +1,4 @@
+import { requestInterceptorFunction } from '@server/utils/customProxyAgent';
 import type { AxiosInstance, AxiosRequestConfig } from 'axios';
 import axios from 'axios';
 import rateLimit from 'axios-rate-limit';
@@ -37,8 +38,7 @@ class ExternalAPI {
         ...options.headers,
       },
     });
-    this.axios.interceptors.request = axios.interceptors.request;
-    this.axios.interceptors.response = axios.interceptors.response;
+    this.axios.interceptors.request.use(requestInterceptorFunction);
 
     if (options.rateLimit) {
       this.axios = rateLimit(this.axios, {

server/api/tautulli.ts

@@ -1,6 +1,7 @@
 import type { User } from '@server/entity/User';
 import type { TautulliSettings } from '@server/lib/settings';
 import logger from '@server/logger';
+import { requestInterceptorFunction } from '@server/utils/customProxyAgent';
 import type { AxiosInstance } from 'axios';
 import axios from 'axios';
 import { uniqWith } from 'lodash';
@@ -123,8 +124,7 @@ class TautulliAPI {
       }${settings.urlBase ?? ''}`,
       params: { apikey: settings.apiKey },
     });
-    this.axios.interceptors.request = axios.interceptors.request;
-    this.axios.interceptors.response = axios.interceptors.response;
+    this.axios.interceptors.request.use(requestInterceptorFunction);
   }
 
   public async getInfo(): Promise<TautulliInfo> {