8726 swapped product db table (#530)

* Add sql for swapped table

* Fix swapped_designer_products table schema: rename column and enforce uniqueness constraints

* Remove drop if exists

* Change filename for merge with master

* Change table name

* Corrected file name

* Corrected comment

* Change migration name for merge

migrations/000.605.sql

@@ -0,0 +1,13 @@
+-- Migration: 000.604.sql
+-- Description: Create table for tracking swapped products with cascade delete behavior
+CREATE TABLE swapped_products (
+    id INT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+    original_product_id INTEGER NOT NULL REFERENCES "product-products"(productid),
+    new_product_id INTEGER NOT NULL REFERENCES "product-products"(productid),
+    swapped_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    -- Ensure unique combination of original and swapped product (prevent duplicates)
+    UNIQUE(original_product_id),
+    UNIQUE(new_product_id),
+    CHECK (original_product_id IS DISTINCT FROM new_product_id)
+);