feat: add feishu api notification services

review_agent/notifications/context.py

@@ -0,0 +1,22 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+
+
+@dataclass(frozen=True)
+class NotificationContext:
+    workflow_type: str
+    workflow_name: str
+    workflow_batch_id: int
+    workflow_batch_no: str
+    workflow_status: str
+    trigger_user_id: int
+    trigger_username: str
+    title: str
+    summary_lines: tuple[str, ...]
+    next_step: str
+    result_path: str
+
+    @property
+    def dedupe_key(self) -> str:
+        return f"{self.workflow_type}:{self.workflow_batch_id}:{self.workflow_status}"