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/origin/logics_test.go

@@ -0,0 +1,80 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package origin
+
+import (
+	"context"
+	"testing"
+
+	"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 setupOriginTestDB(t *testing.T) func() {
+	t.Helper()
+
+	sqliteDB, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{
+		DisableForeignKeyConstraintWhenMigrating: true,
+	})
+	require.NoError(t, err)
+	require.NoError(t, sqliteDB.AutoMigrate(&model.Origin{}))
+
+	db.SetDB(sqliteDB)
+	return func() {
+		db.SetDB(nil)
+	}
+}
+
+func TestCreateOrigin(t *testing.T) {
+	cleanup := setupOriginTestDB(t)
+	defer cleanup()
+	ctx := context.Background()
+
+	origin, err := CreateOrigin(ctx, Input{
+		Name:    "Primary Origin",
+		Address: "origin-a.internal",
+		Remark:  "main upstream",
+	})
+	require.NoError(t, err)
+	assert.NotZero(t, origin.ID)
+	assert.Equal(t, "Primary Origin", origin.Name)
+	assert.Equal(t, "origin-a.internal", origin.Address)
+	assert.Equal(t, "main upstream", origin.Remark)
+
+	_, err = CreateOrigin(ctx, Input{
+		Address: "origin-a.internal",
+	})
+	require.Error(t, err)
+	assert.Equal(t, errOriginAddressExists, err.Error())
+}
+
+func TestListOrigins(t *testing.T) {
+	cleanup := setupOriginTestDB(t)
+	defer cleanup()
+	ctx := context.Background()
+
+	first, err := CreateOrigin(ctx, Input{
+		Name:    "first-origin",
+		Address: "origin-a.internal",
+	})
+	require.NoError(t, err)
+
+	second, err := CreateOrigin(ctx, Input{
+		Name:    "second-origin",
+		Address: "origin-b.internal",
+	})
+	require.NoError(t, err)
+
+	origins, err := ListOrigins(ctx)
+	require.NoError(t, err)
+	require.Len(t, origins, 2)
+	assert.Equal(t, second.ID, origins[0].ID)
+	assert.Equal(t, first.ID, origins[1].ID)
+	assert.Equal(t, int64(0), origins[0].RouteCount)
+	assert.Equal(t, int64(0), origins[1].RouteCount)
+}