feat(bat): 补全工作流校验与调度过滤

新增 parse clear-cache 和 i18n validate，补齐 schedule 的作用域过滤与单轮执行上限，并将列表过滤参数暴露给 bat-api dashboard。同步 RPC、OpenAPI、用户文档和回归测试。

Refs #43

internal/backendrpc/client_test.go

@@ -298,6 +298,44 @@ func TestScheduleUpdateSendsMutationParams(t *testing.T) {
 	}
 }
 
+func TestScheduleRunSendsScopeAndMaxRuns(t *testing.T) {
+	maxRuns := uint64(2)
+	client := newTestClient(t, func(t *testing.T, req testRequest) testResponse {
+		if req.Method != "schedule.run" {
+			t.Fatalf("method = %s", req.Method)
+		}
+		var params ScheduleRunParams
+		if err := json.Unmarshal(req.Params, &params); err != nil {
+			t.Fatalf("decode params: %v", err)
+		}
+		if params.ID != "nightly-pull" || params.Group != "res" || !params.Force ||
+			params.MaxRuns == nil || *params.MaxRuns != maxRuns {
+			t.Fatalf("params = %#v", params)
+		}
+		return testResponse{
+			Result: testEnvelope{
+				OK:        true,
+				Status:    "ok",
+				RequestID: "req-test-schedule-run",
+				Data:      map[string]any{"command": "schedule-run", "executed": []any{}},
+			},
+		}
+	})
+
+	raw, err := client.ScheduleRun(context.Background(), ScheduleRunParams{
+		ID:      "nightly-pull",
+		Group:   "res",
+		Force:   true,
+		MaxRuns: &maxRuns,
+	})
+	if err != nil {
+		t.Fatalf("ScheduleRun error: %v", err)
+	}
+	if !json.Valid(raw) {
+		t.Fatalf("invalid raw JSON: %s", string(raw))
+	}
+}
+
 func TestApplicationErrorReturnsAPIError(t *testing.T) {
 	client := newTestClient(t, func(t *testing.T, req testRequest) testResponse {
 		if req.Method != "task.status" {