新增请求/响应日志中间件，支持详细的请求和响应信息记录

.env.example

@@ -53,10 +53,14 @@ STREAM_CHUNK_SIZE=1024
 # Logging
 # Log level: DEBUG, INFO, WARNING, ERROR, CRITICAL
 LOG_LEVEL=INFO
-# Log incoming requests (may contain sensitive data)
+
+# Enable detailed request/response logging for debugging
+# LOG_REQUESTS: Print incoming request details (method, URL, headers, body)
+# LOG_RESPONSES: Print outgoing response details (status, headers, body)
+# Note: Sensitive data (like API keys) are automatically filtered from logs
 LOG_REQUESTS=false
-# Log responses (may contain sensitive data)
 LOG_RESPONSES=false
+
 # Log file path (optional, if not set logs only to console)
 LOG_FILE=./logs/app.log
 # Max log file size in MB (default: 10)