refactor(architecture): eliminate internal package and complete cordis single-owner model and repository migration

- Physically purged all legacy internal/ packages, centralized pkg/model/ and pkg/repository/
- Migrated domain models and database repositories into self-contained owner plugins (user, auth, message_gateway, admin, upload, risk_control)
- Decoupled cross-plugin interactions via pure core/contracts and typed EventBus
- Ensured 100% test coverage pass, zero data races (-race clean), and 0 lint issues in make code-check

pkg/task/utils_test.go

@@ -0,0 +1,76 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package task
+
+import (
+	"testing"
+
+	"github.com/Rain-kl/Wavelet/pkg/config"
+	"github.com/redis/go-redis/v9"
+	"github.com/redis/go-redis/v9/maintnotifications"
+)
+
+func TestNewRedisConnOptConfiguresMaintenanceNotifications(t *testing.T) {
+	previous := config.Config.Redis
+	t.Cleanup(func() { config.Config.Redis = previous })
+
+	for _, test := range []struct {
+		name    string
+		enabled bool
+		want    maintnotifications.Mode
+	}{
+		{name: "disabled by default", enabled: false, want: maintnotifications.ModeDisabled},
+		{name: "auto when enabled", enabled: true, want: maintnotifications.ModeAuto},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			config.Config.Redis.MaintNotifications = test.enabled
+
+			t.Run("standalone", func(t *testing.T) {
+				config.Config.Redis.ClusterMode = false
+				config.Config.Redis.MasterName = ""
+				config.Config.Redis.Addrs = []string{"127.0.0.1:6379"}
+
+				client, ok := NewRedisConnOpt().MakeRedisClient().(*redis.Client)
+				if !ok {
+					t.Fatal("standalone option did not create *redis.Client")
+				}
+				defer func() { _ = client.Close() }()
+				assertMaintenanceNotificationsMode(t, client.Options().MaintNotificationsConfig, test.want)
+			})
+
+			t.Run("cluster", func(t *testing.T) {
+				config.Config.Redis.ClusterMode = true
+				config.Config.Redis.MasterName = ""
+				config.Config.Redis.Addrs = []string{"127.0.0.1:6379"}
+
+				client, ok := NewRedisConnOpt().MakeRedisClient().(*redis.ClusterClient)
+				if !ok {
+					t.Fatal("cluster option did not create *redis.ClusterClient")
+				}
+				defer func() { _ = client.Close() }()
+				assertMaintenanceNotificationsMode(t, client.Options().MaintNotificationsConfig, test.want)
+			})
+
+			t.Run("sentinel", func(t *testing.T) {
+				config.Config.Redis.ClusterMode = false
+				config.Config.Redis.MasterName = "openflare"
+				config.Config.Redis.Addrs = []string{"127.0.0.1:26379"}
+
+				client, ok := NewRedisConnOpt().MakeRedisClient().(*redis.Client)
+				if !ok {
+					t.Fatal("sentinel option did not create *redis.Client")
+				}
+				defer func() { _ = client.Close() }()
+				assertMaintenanceNotificationsMode(t, client.Options().MaintNotificationsConfig, test.want)
+			})
+		})
+	}
+}
+
+func assertMaintenanceNotificationsMode(t *testing.T, cfg *maintnotifications.Config, want maintnotifications.Mode) {
+	t.Helper()
+	if cfg == nil || cfg.Mode != want {
+		t.Fatalf("maintenance notifications mode = %v, want %v", cfg, want)
+	}
+}