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/account_repository.go

@@ -0,0 +1,73 @@
+package repository
+
+import (
+	"context"
+	"strings"
+
+	"gorm.io/gorm"
+	"stream.api/internal/database/model"
+)
+
+type accountRepository struct {
+	db *gorm.DB
+}
+
+func NewAccountRepository(db *gorm.DB) *accountRepository {
+	return &accountRepository{db: db}
+}
+
+func (r *accountRepository) DeleteUserAccount(ctx context.Context, userID string) error {
+	userID = strings.TrimSpace(userID)
+	return r.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
+		if err := tx.Where("user_id = ?", userID).Delete(&model.Notification{}).Error; err != nil {
+			return err
+		}
+		if err := tx.Where("user_id = ?", userID).Delete(&model.Domain{}).Error; err != nil {
+			return err
+		}
+		if err := tx.Where("user_id = ?", userID).Delete(&model.AdTemplate{}).Error; err != nil {
+			return err
+		}
+		if err := tx.Where("user_id = ?", userID).Delete(&model.WalletTransaction{}).Error; err != nil {
+			return err
+		}
+		if err := tx.Where("user_id = ?", userID).Delete(&model.PlanSubscription{}).Error; err != nil {
+			return err
+		}
+		if err := tx.Where("user_id = ?", userID).Delete(&model.UserPreference{}).Error; err != nil {
+			return err
+		}
+		if err := tx.Where("user_id = ?", userID).Delete(&model.Payment{}).Error; err != nil {
+			return err
+		}
+		if err := tx.Where("user_id = ?", userID).Delete(&model.Video{}).Error; err != nil {
+			return err
+		}
+		if err := tx.Where("id = ?", userID).Delete(&model.User{}).Error; err != nil {
+			return err
+		}
+		return nil
+	})
+}
+
+func (r *accountRepository) ClearUserData(ctx context.Context, userID string) error {
+	userID = strings.TrimSpace(userID)
+	return r.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
+		if err := tx.Where("user_id = ?", userID).Delete(&model.Notification{}).Error; err != nil {
+			return err
+		}
+		if err := tx.Where("user_id = ?", userID).Delete(&model.Domain{}).Error; err != nil {
+			return err
+		}
+		if err := tx.Where("user_id = ?", userID).Delete(&model.AdTemplate{}).Error; err != nil {
+			return err
+		}
+		if err := tx.Where("user_id = ?", userID).Delete(&model.Video{}).Error; err != nil {
+			return err
+		}
+		if err := tx.Model(&model.User{}).Where("id = ?", userID).Updates(map[string]any{"storage_used": 0}).Error; err != nil {
+			return err
+		}
+		return nil
+	})
+}