feat: Use embeddings in help center search (#9227)

enterprise/app/services/features/base_service.rb

@@ -0,0 +1,7 @@
+class Features::BaseService
+  MIGRATION_VERSION = ActiveRecord::Migration[7.0]
+
+  def vector_extension_enabled?
+    ActiveRecord::Base.connection.extension_enabled?('vector')
+  end
+end