Feat[BE]: implement FIFO stock management for marketing delivery products, including migration scripts and updates to related services and DTOs

internal/database/migrations/20251226114218_add.up.sql

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+-- Add product_warehouse_id column to marketing_delivery_products
+ALTER TABLE marketing_delivery_products
+ADD COLUMN IF NOT EXISTS product_warehouse_id INT NOT NULL DEFAULT 0;
+
+-- Fill product_warehouse_id from marketing_products
+UPDATE marketing_delivery_products mdp
+SET product_warehouse_id = mp.product_warehouse_id
+FROM marketing_products mp
+WHERE mdp.marketing_product_id = mp.id
+  AND mdp.product_warehouse_id = 0;
+
+-- Set NOT NULL constraint
+ALTER TABLE marketing_delivery_products
+ALTER COLUMN product_warehouse_id SET NOT NULL;
+
+-- Add foreign key constraint
+ALTER TABLE marketing_delivery_products
+ADD CONSTRAINT fk_marketing_delivery_products_product_warehouse
+FOREIGN KEY (product_warehouse_id) REFERENCES product_warehouses(id);