Fix websockets compatibility issue for HuggingFace deployment

- Add websockets version constraint to requirements.txt (>=11.0.3,<12.0.0)
- Add exception handling for OpenAI/Supabase module imports
- Fall back to FAISS mode when Supabase modules are unavailable
- Update default VECTOR_DB_TYPE to faiss in .env.example for stability

This resolves ModuleNotFoundError: No module named 'websockets.asyncio'
that occurs during HuggingFace Spaces deployment.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.env.example

@@ -9,7 +9,8 @@
 # SUPABASE_KEY=your_supabase_key_here
 
 # 벡터 DB 타입 (faiss 또는 supabase)
-VECTOR_DB_TYPE=supabase
+# 허깅페이스 배포 시에는 faiss를 권장합니다
+VECTOR_DB_TYPE=faiss
 
 # 기존 FAISS 설정 (VECTOR_DB_TYPE=faiss 인 경우 사용)
 EMBEDDING_MODEL=jhgan/ko-sbert-nli

app.py

@@ -19,17 +19,33 @@ sys.path.append(current_dir)
 # 모듈 임포트
 from config import Config
 from rag_chatbot import RAGChatbot
-from openai_chatbot import OpenAIRAGChatbot
 from document_processor import DocumentProcessor
 
+# OpenAI/Supabase 관련 모듈은 에러 처리 후 임포트
+try:
+    from openai_chatbot import OpenAIRAGChatbot
+    OPENAI_AVAILABLE = True
+except ImportError as e:
+    print(f"OpenAI 모듈 임포트 오류: {e}")
+    print("FAISS 모드로 실행됩니다.")
+    OPENAI_AVAILABLE = False
+    OpenAIRAGChatbot = None
+
 class HuggingFaceApp:
     """허깅페이스 Spaces 배포용 앱 클래스"""
 
     def __init__(self):
         # 벡터 DB 타입에 따라 챗봇 선택
-        if Config.VECTOR_DB_TYPE == "supabase":
-            self.chatbot = OpenAIRAGChatbot()
+        if Config.VECTOR_DB_TYPE == "supabase" and OPENAI_AVAILABLE and OpenAIRAGChatbot:
+            try:
+                self.chatbot = OpenAIRAGChatbot()
+            except Exception as e:
+                print(f"Supabase 챗봇 초기화 오류: {e}")
+                print("FAISS 모드로 전환됩니다.")
+                self.chatbot = RAGChatbot()
         else:
+            if Config.VECTOR_DB_TYPE == "supabase" and not OPENAI_AVAILABLE:
+                print("OpenAI 모듈을 사용할 수 없어 FAISS 모드로 실행됩니다.")
             self.chatbot = RAGChatbot()
         self.is_initialized = False
 

requirements.txt

@@ -26,6 +26,7 @@ PyMuPDF>=1.23.8
 
 # Supabase
 supabase>=2.0.0
+websockets>=11.0.3,<12.0.0
 openai>=1.0.0
 
 # 유틸리티