feat: integrate vaderSentiment analysis into article ingestion and search endpoints

templates/newspaper_view.html

@@ -164,6 +164,7 @@
                 <h2 class="article-title">
                     <a href="{{ article.link }}" target="_blank">{{ article.title }}</a>
                 </h2>
+                <input type="hidden" name="sentiment" value="{{ article.sentiment }}">
                 <div class="article-meta">
                     <span class="article-source">{{ article.feed_name }}</span>
                     {% if article.author %}