feat(task): auto-inject scheduling params into script template via scheduling_map

Add scheduling_map field to ParameterSchema so Application creators can
declare that a parameter (e.g. NP) maps to a scheduling field (e.g. cpus).
The backend auto-injects the scheduling value into script template variables
before rendering, eliminating duplicate user input. The frontend hides
mapped parameters from the form and injects their values on submit.

internal/service/task_service_test.go

@@ -1266,3 +1266,49 @@ func TestProcessTask_PartialSchedulingParams(t *testing.T) {
 		t.Errorf("KillOnNodeFail = %v, want nil", j.KillOnNodeFail)
 	}
 }
+
+func TestTaskService_ProcessTask_SchedulingMapInjection(t *testing.T) {
+	jobID := int32(42)
+
+	var capturedReq slurm.JobSubmitReq
+
+	env := newTaskTestEnv(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if err := json.NewDecoder(r.Body).Decode(&capturedReq); err != nil {
+			t.Fatalf("decode request body: %v", err)
+		}
+		json.NewEncoder(w).Encode(slurm.OpenapiJobSubmitResponse{
+			Result: &slurm.JobSubmitResponseMsg{JobID: &jobID},
+		})
+	}))
+	defer env.close()
+
+	params := json.RawMessage(`[
+		{"name": "NP", "type": "integer", "scheduling_map": "cpus", "required": true}
+	]`)
+	appID := env.createApp(t, "sched-map-app", "#!/bin/bash\nmpirun -np $NP my_app", params)
+
+	cpus := int32(8)
+	task, err := env.svc.CreateTask(context.Background(), &model.CreateTaskRequest{
+		AppID:    appID,
+		TaskName: "sched-map-test",
+		Cpus:     &cpus,
+	})
+	if err != nil {
+		t.Fatalf("CreateTask: %v", err)
+	}
+
+	if err := env.svc.ProcessTask(context.Background(), task.ID); err != nil {
+		t.Fatalf("ProcessTask: %v", err)
+	}
+
+	if capturedReq.Script == nil {
+		t.Fatal("submitted script is nil")
+	}
+
+	if !strings.Contains(*capturedReq.Script, "'8'") {
+		t.Errorf("rendered script does not contain shell-escaped scheduling value:\n%s", *capturedReq.Script)
+	}
+	if !strings.Contains(*capturedReq.Script, "mpirun -np '8'") {
+		t.Errorf("rendered script does not contain expected mpirun command:\n%s", *capturedReq.Script)
+	}
+}