Update app.py

app.py

@@ -42,10 +42,10 @@ def search_similar_chats(query: str, maxResults: int = 10) -> List[Dict]:
     conn = get_db_conn()
     with conn.cursor() as cur:
         cur.execute("""
-            SELECT id, metadata, content, embedding <#> %s AS distance
+            SELECT id, metadata, content, embedding <#> %s::vector AS distance
             FROM vector_store
             WHERE metadata->>'documentType' = 'chatAnalysis'
-            ORDER BY embedding <#> %s
+            ORDER BY embedding <#> %s::vector
             LIMIT %s
         """, (embedding, embedding, maxResults))
         rows = cur.fetchall()