change source of account id in prepared token to domain account id, create consumer salesInvoiceModule

.env.example

@@ -0,0 +1,24 @@
+# Server Configuration
+NODE_ENV=development
+PORT=5002
+
+# Database Configuration
+DB_HOST=localhost
+DB_PORT=3306
+DB_NAME=consumer_db
+DB_USER=consumer_user
+DB_PASSWORD=consumer_password
+DB_ROOT_PASSWORD=root_password
+DATABASE_URL=mysql://consumer_user:consumer_password@localhost:3306/consumer_db
+SHADOW_DATABASE_URL=mysql://consumer_user:consumer_password@localhost:3306/consumer_db_shadow
+
+# JWT Configuration
+JWT_SECRET=your_super_secret_jwt_key_change_this_in_production
+JWT_EXPIRATION=604800
+
+# CORS Configuration
+CORS_ORIGINS=http://localhost:5000,http://127.0.0.1:5000
+
+# File Upload Configuration
+UPLOAD_PATH=./uploads
+MAX_FILE_SIZE=10485760