Add approval continuation and multi-step tools

duck_core/approvals/service.py

@@ -93,6 +93,16 @@ class ApprovalService:
             rows = await cursor.fetchall()
         return [self._row_to_approval(row) for row in rows]
 
+    async def get(self, approval_id: str) -> Approval | None:
+        await self.init()
+        async with aiosqlite.connect(self.db_path) as db:
+            db.row_factory = aiosqlite.Row
+            cursor = await db.execute(
+                "select * from approvals where approval_id = ?", (approval_id,)
+            )
+            row = await cursor.fetchone()
+        return self._row_to_approval(row) if row else None
+
     async def allow_once(self, approval_id: str) -> None:
         await self._decide(approval_id, "resolved", "allow_once")