[Enhancement] Add rate limiting to yt-dlp requests; prevent saving Media Items when throttled by YouTube (#559)

* Added sleep interval to settings

* Added new sleep setting to yt-dlp runner and added tests

* Added setting for form; updated setting name

* Updated form label

* Prevented saving/updating of media items if being throttled by youtube

* Added the bot message to the list of non-retryable errors

* Fixed typo

lib/pinchflat_web/controllers/settings/setting_html/setting_form.html.heex

@@ -29,7 +29,7 @@
   <section class="mt-8">
     <section>
       <h3 class="text-2xl text-black dark:text-white">
-        Indexing Settings
+        Extractor Settings
       </h3>
 
       <.input
@@ -41,6 +41,14 @@
         html_help={true}
         inputclass="font-mono text-sm mr-4"
       />
+
+      <.input
+        field={f[:extractor_sleep_interval_seconds]}
+        placeholder="0"
+        type="number"
+        label="Sleep Interval (seconds)"
+        help="Sleep interval in seconds between each extractor request. Must be a positive whole number (or set to 0 to disable)"
+      />
     </section>
   </section>