feat: add invalid tag filtering

Add filtering for all tags to ensure they are taken from tags list.
Warning will be raised if tags not from tag list are encountered.

app.py

@@ -146,7 +146,13 @@ def process_quotes(quotes_file_path: str, quotes_col_name: str, tags_string: str
     for i, quote in enumerate(quotes_data):
         logger.info(f"Tagging quote {i + 1}/{len(quotes_data)}: {quote}")
         tags = tag_quote(quote, tags_list)
-        tags_column.append(tags)
+        valid_tags = []
+        for tag in tags: # filter out any hallucinated tags
+            if tag in tags_list:
+                valid_tags.append(tag)
+            else:
+                logger.warning(f"Invalid tag {tag} found and has been filtered out.")
+        tags_column.append(valid_tags)
 
     quotes_df['Tags'] = tags_column
     logger.info("Quotes tagged")