fix: preserve Today sync enqueue order

tests/test_today_sync.py

@@ -83,6 +83,31 @@ sync.enqueue('add', 'issue:r:1:');
     }
 
 
+def test_operations_queued_in_the_same_millisecond_preserve_enqueue_order():
+    script = f"""
+const createTodaySync = require({json.dumps(str(TODAY_SYNC))});
+const values = new Map();
+const storage = {{
+  get length() {{ return values.size; }}, key: index => [...values.keys()][index] || null,
+  getItem: key => values.get(key) || null,
+  setItem: (key, value) => values.set(key, value), removeItem: key => values.delete(key),
+}};
+const operationIds = ['z-add-first', 'a-move-second'];
+const sync = createTodaySync({{
+  storage, getLogin: () => 'timmy', now: () => 1000,
+  createOperationId: () => operationIds.shift(),
+  fetchJson: async () => ({{revision: 0, ids: []}}),
+}});
+sync.enqueue('add', 'issue:r:1:');
+sync.enqueue('move', 'issue:r:1:', 'up');
+process.stdout.write(JSON.stringify(sync.pending().map(operation => operation.operation_id)));
+"""
+
+    assert json.loads(subprocess.run(
+        ["node", "-e", script], check=True, capture_output=True, text=True
+    ).stdout) == ["z-add-first", "a-move-second"]
+
+
 def test_today_capacity_configuration_syncs_offline_and_adopts_remote_plan():
     script = f"""
 const createTodaySync = require({json.dumps(str(TODAY_SYNC))});