Enhancement: support Tdarr widget auth (#3940)

---------

Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>

docs/widgets/services/tdarr.md

@@ -11,4 +11,5 @@ Allowed fields: `["queue", "processed", "errored", "saved"]`.
 widget:
   type: tdarr
   url: http://tdarr.host.or.ip
+  key: tdarrapikey # optional, false if unused
 ```

src/widgets/tdarr/proxy.js

@@ -21,9 +21,13 @@ export default async function tdarrProxyHandler(req, res) {
     logger.debug("Invalid or missing widget for service '%s' in group '%s'", service, group);
     return res.status(400).json({ error: "Invalid proxy service type" });
   }
-
+  const headers = {
+    "content-type": "application/json",
+  };
+  if (widget.key) {
+    headers["x-api-key"] = `${widget.key}`;
+  }
   const url = new URL(formatApiCall(widgets[widget.type].api, { endpoint: undefined, ...widget }));
-
   const [status, contentType, data] = await httpProxy(url, {
     method: "POST",
     body: JSON.stringify({
@@ -33,9 +37,7 @@ export default async function tdarrProxyHandler(req, res) {
         docID: "statistics",
       },
     }),
-    headers: {
-      "content-type": "application/json",
-    },
+    headers,
   });
 
   if (status !== 200) {