feat(event): add outbound event models

channel-service/app/models/event.py

@@ -0,0 +1,44 @@
+from __future__ import annotations
+
+import uuid
+from dataclasses import dataclass, field
+from datetime import datetime, timezone
+from enum import Enum
+from typing import Any
+
+
+class EventType(str, Enum):
+    HEARTBEAT = "heartbeat"
+    LOGIN_STATUS_CHANGED = "login_status_changed"
+    ONLINE_STATUS_CHANGED = "online_status_changed"
+    SEND_RESULT = "send_result"
+    ERROR = "error"
+
+
+class EventStatus(str, Enum):
+    PENDING = "pending"
+    RETRYING = "retrying"
+    DELIVERED = "delivered"
+    DEAD_LETTER = "dead_letter"
+
+
+@dataclass
+class OutboundEvent:
+    event_type: EventType
+    account_id: str
+    tenant_code: str
+    data: dict[str, Any]
+    event_id: str = field(default_factory=lambda: str(uuid.uuid4()))
+    timestamp: datetime = field(
+        default_factory=lambda: datetime.now(timezone.utc)
+    )
+
+    def to_payload(self) -> dict[str, Any]:
+        return {
+            "event_id": self.event_id,
+            "event_type": self.event_type.value,
+            "account_id": self.account_id,
+            "tenant_code": self.tenant_code,
+            "timestamp": self.timestamp.isoformat(),
+            "data": self.data,
+        }