feat: add test database setup and usage helpers

- Introduced a new test file for setting up an in-memory SQLite database for testing purposes.
- Added helper functions for seeding test data, including users, plans, subscriptions, and wallet transactions.
- Implemented usage helpers to load user video counts and storage usage.
- Created user payload struct and functions to build user payloads with preferences and wallet balance.
- Refactored gRPC server setup to include new services and handlers.
- Updated proto files to simplify service definitions by removing redundant service prefixes.

internal/service/service_admin_finance_catalog_test.go

@@ -0,0 +1,78 @@
+package service
+
+import (
+	"testing"
+
+	"github.com/google/uuid"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/metadata"
+	appv1 "stream.api/internal/api/proto/app/v1"
+	"stream.api/internal/database/model"
+)
+
+func TestCreateAdminPayment(t *testing.T) {
+
+	t.Run("happy path admin", func(t *testing.T) {
+		db := newTestDB(t)
+		services := newTestAppServices(t, db)
+		admin := seedTestUser(t, db, model.User{ID: uuid.NewString(), Email: "admin@example.com", Role: ptrString("ADMIN")})
+		user := seedTestUser(t, db, model.User{ID: uuid.NewString(), Email: "user@example.com", Role: ptrString("USER")})
+		plan := seedTestPlan(t, db, model.Plan{ID: uuid.NewString(), Name: "Team", Price: 30, Cycle: "monthly", StorageLimit: 200, UploadLimit: 20, QualityLimit: "1440p", IsActive: ptrBool(true)})
+		seedWalletTransaction(t, db, model.WalletTransaction{ID: uuid.NewString(), UserID: user.ID, Type: walletTransactionTypeTopup, Amount: 5, Currency: ptrString("USD")})
+
+		conn, cleanup := newTestGRPCServer(t, services)
+		defer cleanup()
+
+		client := newAdminClient(conn)
+		resp, err := client.CreateAdminPayment(testActorOutgoingContext(admin.ID, "ADMIN"), &appv1.CreateAdminPaymentRequest{
+			UserId:        user.ID,
+			PlanId:        plan.ID,
+			TermMonths:    1,
+			PaymentMethod: paymentMethodTopup,
+			TopupAmount:   ptrFloat64(25),
+		})
+		if err != nil {
+			t.Fatalf("CreateAdminPayment() error = %v", err)
+		}
+		if resp.Payment == nil || resp.Subscription == nil {
+			t.Fatalf("CreateAdminPayment() response incomplete: %#v", resp)
+		}
+		if resp.Payment.UserId != user.ID {
+			t.Fatalf("payment user_id = %q, want %q", resp.Payment.UserId, user.ID)
+		}
+		if resp.InvoiceId != buildInvoiceID(resp.Payment.Id) {
+			t.Fatalf("invoice id = %q, want %q", resp.InvoiceId, buildInvoiceID(resp.Payment.Id))
+		}
+		if resp.Payment.GetWalletAmount() != 30 {
+			t.Fatalf("payment wallet_amount = %v, want 30", resp.Payment.GetWalletAmount())
+		}
+		if resp.Payment.GetTopupAmount() != 25 {
+			t.Fatalf("payment topup_amount = %v, want 25", resp.Payment.GetTopupAmount())
+		}
+	})
+
+	t.Run("wallet thiếu tiền giữ trailer", func(t *testing.T) {
+		db := newTestDB(t)
+		services := newTestAppServices(t, db)
+		admin := seedTestUser(t, db, model.User{ID: uuid.NewString(), Email: "admin@example.com", Role: ptrString("ADMIN")})
+		user := seedTestUser(t, db, model.User{ID: uuid.NewString(), Email: "user@example.com", Role: ptrString("USER")})
+		plan := seedTestPlan(t, db, model.Plan{ID: uuid.NewString(), Name: "Team", Price: 30, Cycle: "monthly", StorageLimit: 200, UploadLimit: 20, QualityLimit: "1440p", IsActive: ptrBool(true)})
+
+		conn, cleanup := newTestGRPCServer(t, services)
+		defer cleanup()
+
+		client := newAdminClient(conn)
+		var trailer metadata.MD
+		_, err := client.CreateAdminPayment(testActorOutgoingContext(admin.ID, "ADMIN"), &appv1.CreateAdminPaymentRequest{
+			UserId:        user.ID,
+			PlanId:        plan.ID,
+			TermMonths:    1,
+			PaymentMethod: paymentMethodWallet,
+		}, grpc.Trailer(&trailer))
+		assertGRPCCode(t, err, codes.InvalidArgument)
+		if body := firstTestMetadataValue(trailer, "x-error-body"); body == "" {
+			t.Fatal("expected x-error-body trailer")
+		}
+	})
+}