Update app.py

app.py

@@ -21,8 +21,7 @@ if not OPENROUTER_API_KEY:
     raise ValueError("❌ OPENROUTER_API_KEY is missing. Set it as an environment variable.")
 
 OPENROUTER_BASE_URL = "https://openrouter.ai/api/v1/chat/completions"
-
-embedding_model = SentenceTransformer("sentence-transformers/paraphrase-MiniLM-L6-v2", cache_folder="/app/cache")
+embedding_model = SentenceTransformer("sentence-transformers/all-MiniLM-L6-v2", cache_folder="/app/cache")
 summarization_model = AutoModelForSeq2SeqLM.from_pretrained("google/long-t5-tglobal-base", cache_dir="/app/cache")
 summarization_tokenizer = AutoTokenizer.from_pretrained("google/long-t5-tglobal-base", cache_dir="/app/cache")