refactor(repo): consolidate openflare-server to root and move subprojects to internal/apps

- Merge all files inside openflare-server to the repository root directory.
- Relocate agent, relay, and flared subprojects from internal/ to internal/apps/.
- Combine docker-compose files and update build context paths to root.
- Update GitHub workflows and Dockerfiles to refer to new directories and package names.
- Rewrite Go package imports across all files.
- Resolve database renew test race condition and clean up docs.

internal/apps/openflare/async_tasks_test.go

@@ -0,0 +1,84 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package openflare
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/Rain-kl/Wavelet/internal/db"
+	"github.com/Rain-kl/Wavelet/internal/model"
+	"github.com/glebarez/sqlite"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"gorm.io/gorm"
+)
+
+func TestDatabaseAutoCleanupHandlerSkipsWhenDisabled(t *testing.T) {
+	previousEnabled := model.DatabaseAutoCleanupEnabled
+	model.DatabaseAutoCleanupEnabled = false
+	t.Cleanup(func() {
+		model.DatabaseAutoCleanupEnabled = previousEnabled
+	})
+
+	result, err := (&DatabaseAutoCleanupHandler{}).Execute(context.Background(), nil)
+	require.NoError(t, err)
+	require.NotNil(t, result)
+	assert.Contains(t, result.Message, "未启用")
+}
+
+func TestDatabaseAutoCleanupHandlerDeletesRowsWhenEnabled(t *testing.T) {
+	sqliteDB, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{
+		DisableForeignKeyConstraintWhenMigrating: true,
+	})
+	require.NoError(t, err)
+	db.SetDB(sqliteDB)
+	resetAccessLogStore := model.SetAccessLogStoreForTest(model.NewMemoryAccessLogStore())
+	t.Cleanup(func() {
+		resetAccessLogStore()
+		db.SetDB(nil)
+	})
+
+	now := time.Now().UTC()
+	require.NoError(t, model.InsertOpenFlareAccessLogsBatch(context.Background(), []*model.OpenFlareAccessLog{{
+		NodeID:     "node-a",
+		LoggedAt:   now.Add(-48 * time.Hour),
+		RemoteAddr: "203.0.113.10",
+		Host:       "example.com",
+		Path:       "/access",
+		StatusCode: 200,
+	}}))
+
+	previousEnabled := model.DatabaseAutoCleanupEnabled
+	previousRetentionDays := model.DatabaseAutoCleanupRetentionDays
+	model.DatabaseAutoCleanupEnabled = true
+	model.DatabaseAutoCleanupRetentionDays = 1
+	t.Cleanup(func() {
+		model.DatabaseAutoCleanupEnabled = previousEnabled
+		model.DatabaseAutoCleanupRetentionDays = previousRetentionDays
+	})
+
+	result, err := (&DatabaseAutoCleanupHandler{}).Execute(context.Background(), nil)
+	require.NoError(t, err)
+	require.NotNil(t, result)
+	assert.Contains(t, result.Message, "共删除")
+
+	rows, err := model.ListOpenFlareAccessLogs(context.Background(), model.OpenFlareAccessLogQuery{Page: 0, PageSize: 10})
+	require.NoError(t, err)
+	assert.Empty(t, rows)
+}
+
+func TestUptimeKumaSyncHandlerSkipsWhenDisabled(t *testing.T) {
+	previousEnabled := model.UptimeKumaEnabled
+	model.UptimeKumaEnabled = false
+	t.Cleanup(func() {
+		model.UptimeKumaEnabled = previousEnabled
+	})
+
+	result, err := (&UptimeKumaSyncHandler{}).Execute(context.Background(), nil)
+	require.NoError(t, err)
+	require.NotNil(t, result)
+	assert.Contains(t, result.Message, "未启用")
+}