新增数据库支持，初始化数据库并创建查询类型和点踩原因表，优化日志记录，添加多个API以支持点踩原因和查询统计功能。

rag2_0/dify/intent_recognition_api.py

@@ -18,12 +18,15 @@ import sys
 sys.path.append(os.getcwd())
 from rag2_0.intent_recognition import AsyncIntentRecognizer
 
+# 确保日志目录存在
+os.makedirs('data/logs', exist_ok=True)
 
 logging.basicConfig(
     level=logging.INFO,
-    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
+    format='%(asctime)s - %(process)d - %(thread)d - %(name)s - %(levelname)s - %(message)s',
     handlers=[
-        logging.StreamHandler()
+        logging.StreamHandler(),
+        logging.FileHandler(f'data/logs/intent_recognition_{datetime.datetime.now().strftime("%Y%m%d")}.log', encoding='utf-8')
     ]
 )
 logging.getLogger('httpx').setLevel(logging.WARNING)
@@ -118,7 +121,7 @@ async def intent_recognize(request: IntentRecognizeRequest):
         
         end_time = time.time()
         current_time = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S %z")
-        logger.info(f"[{os.getpid()}] 意图识别耗时: {end_time - start_time:.2f}秒")
+        logger.info(f"意图识别耗时: {end_time - start_time:.2f}秒")
 
         # 提取分类信息
         classification = result["classification"]