Add command policy audit trail

duck_core/events/store.py

@@ -90,3 +90,29 @@ class EventStore:
             )
             for row in rows
         ]
+
+    async def list_by_type(self, event_type: str, limit: int = 100) -> list[Event]:
+        await self.init()
+        async with aiosqlite.connect(self.db_path) as db:
+            db.row_factory = aiosqlite.Row
+            cursor = await db.execute(
+                """
+                select * from events
+                where event_type = ?
+                order by id desc
+                limit ?
+                """,
+                (event_type, limit),
+            )
+            rows = await cursor.fetchall()
+        return [
+            Event(
+                id=row["id"],
+                task_id=row["task_id"],
+                sequence=row["sequence"],
+                event_type=row["event_type"],
+                payload=json.loads(row["payload_json"]),
+                created_at=row["created_at"],
+            )
+            for row in rows
+        ]