(fix): purge document cache again after transaction commit

The purge inside updateDocument and deleteDocument runs within the
transaction, before the write is visible. A concurrent reader landing
between that purge and the commit reads the old row and re-caches it,
and with no purge following, the stale version is served for up to 24
hours. Purging again after the transaction closes that window.

Author: ChiragAgg5k

src/Database/Database.php

@@ -6365,6 +6365,9 @@ public function updateDocument(string $collection, string $id, Document $documen
             return $document;
         }
 
+        // Purge again after commit so readers cannot re-cache the pre-commit version
+        $this->purgeCachedDocumentInternal($collection->getId(), $id);
+
         if (!$this->inBatchRelationshipPopulation && $this->resolveRelationships) {
             $documents = $this->silent(fn () => $this->populateDocumentsRelationships([$document], $collection, $this->relationshipFetchDepth));
             $document = $documents[0];
@@ -7751,6 +7754,8 @@ public function deleteDocument(string $collection, string $id): bool
         });
 
         if ($deleted) {
+            // Purge again after commit so readers cannot re-cache the pre-commit version
+            $this->purgeCachedDocumentInternal($collection->getId(), $id);
             $this->trigger(self::EVENT_DOCUMENT_DELETE, $document);
         }