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

enterprise/app/models/article_embedding.rb

@@ -0,0 +1,23 @@
+# == Schema Information
+#
+# Table name: article_embeddings
+#
+#  id         :bigint           not null, primary key
+#  embedding  :vector(1536)
+#  term       :text             not null
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#  article_id :bigint           not null
+#
+class ArticleEmbedding < ApplicationRecord
+  belongs_to :article
+  has_neighbors :embedding, normalize: true
+
+  before_save :update_response_embedding
+
+  private
+
+  def update_response_embedding
+    self.embedding = Openai::EmbeddingsService.new.get_embedding(term, 'text-embedding-3-small')
+  end
+end