feat: sse && multi_merchant completed

sse/serializers.py

@@ -0,0 +1,27 @@
+from rest_framework import serializers
+
+
+class PushSSEEventSerializer(serializers.Serializer):
+    """
+    SSE 事件推送序列化器
+    
+    用于验证推送到 SSE 客户端的事件数据
+    """
+    message = serializers.CharField(
+        required=True,
+        help_text="要发送的消息内容",
+        max_length=10000,
+        allow_blank=False,
+    )
+    type = serializers.CharField(
+        required=False,
+        default='message',
+        help_text="事件类型，如：message, notification, alert 等",
+        max_length=100,
+    )
+    
+    def validate_message(self, value):
+        """验证消息内容"""
+        if not value or not value.strip():
+            raise serializers.ValidationError("消息内容不能为空")
+        return value.strip()