feat: Implement video workflow repository and related services

- Added videoWorkflowRepository with methods to manage video and user interactions.
- Introduced catalog_mapper for converting database models to protobuf representations.
- Created domain_helpers for normalizing domain and ad format values.
- Defined service interfaces for payment, account, notification, domain, ad template, player config, video, and user management.
- Implemented OAuth helpers for generating state and caching keys.
- Developed payment_proto_helpers for mapping payment-related models to protobuf.
- Added service policy helpers to enforce plan requirements and user permissions.
- Created user_mapper for converting user payloads to protobuf format.
- Implemented value_helpers for handling various value conversions and nil checks.
- Developed video_helpers for normalizing video statuses and managing storage types.
- Created video_mapper for mapping video models to protobuf format.
- Implemented render workflow for managing video creation and job processing.

internal/repository/domain_repository.go

@@ -0,0 +1,46 @@
+package repository
+
+import (
+	"context"
+	"strings"
+
+	"gorm.io/gorm"
+	"stream.api/internal/database/model"
+)
+
+type domainRepository struct {
+	db *gorm.DB
+}
+
+func NewDomainRepository(db *gorm.DB) *domainRepository {
+	return &domainRepository{db: db}
+}
+
+func (r *domainRepository) ListByUser(ctx context.Context, userID string) ([]model.Domain, error) {
+	var rows []model.Domain
+	err := r.db.WithContext(ctx).
+		Where("user_id = ?", strings.TrimSpace(userID)).
+		Order("created_at DESC").
+		Find(&rows).Error
+	return rows, err
+}
+
+func (r *domainRepository) CountByUserAndName(ctx context.Context, userID string, name string) (int64, error) {
+	var count int64
+	err := r.db.WithContext(ctx).
+		Model(&model.Domain{}).
+		Where("user_id = ? AND name = ?", strings.TrimSpace(userID), strings.TrimSpace(name)).
+		Count(&count).Error
+	return count, err
+}
+
+func (r *domainRepository) Create(ctx context.Context, item *model.Domain) error {
+	return r.db.WithContext(ctx).Create(item).Error
+}
+
+func (r *domainRepository) DeleteByIDAndUser(ctx context.Context, id string, userID string) (int64, error) {
+	res := r.db.WithContext(ctx).
+		Where("id = ? AND user_id = ?", strings.TrimSpace(id), strings.TrimSpace(userID)).
+		Delete(&model.Domain{})
+	return res.RowsAffected, res.Error
+}