fix(externalapi): clear cache after a request is made (#1217)

This PR clears the Radarr/Sonarr cache after a request has been made, because the media status on
Radarr/Sonarr will no longer be good. It also resolves a bug that prevented the media from being
deleted after a request had been sent to Radarr/Sonarr.

fix #1207

server/api/externalapi.ts

@@ -293,6 +293,14 @@ class ExternalAPI {
     return data;
   }
 
+  protected removeCache(endpoint: string, params?: Record<string, string>) {
+    const cacheKey = this.serializeCacheKey(endpoint, {
+      ...this.params,
+      ...params,
+    });
+    this.cache?.del(cacheKey);
+  }
+
   private formatUrl(
     endpoint: string,
     params?: Record<string, string>,