feat: add MCP server for the website chatbot over a mirrored TYPO3 content feed

src/Enum/ContentFetchState.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Enum;
+
+/**
+ * Outcome of the last fetch of one content feed item.
+ *
+ * `Empty` and `Failed` are remembered together with the manifest `modified` they were
+ * reached at, so a page that renders without text or keeps answering 404 is not refetched
+ * every run, only once TYPO3 reports a change or the weekly refresh comes round.
+ */
+enum ContentFetchState: string
+{
+    /** Listed in the manifest, not fetched yet. */
+    case Pending = 'pending';
+    case Ok = 'ok';
+    /** Fetched, but converted to no text. Kept out of the index. */
+    case Empty = 'empty';
+    /** The page answered 404 or 5xx. Kept out of the index. */
+    case Failed = 'failed';
+}