Add Customer users

migrations/000029_create_product_ingredients_table.up.sql

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+-- Product ingredients table
+CREATE TABLE product_ingredients (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    organization_id UUID NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
+    outlet_id UUID REFERENCES outlets(id) ON DELETE CASCADE,
+    product_id UUID NOT NULL REFERENCES products(id) ON DELETE CASCADE,
+    ingredient_id UUID NOT NULL REFERENCES ingredients(id) ON DELETE CASCADE,
+    quantity DECIMAL(12,3) NOT NULL,
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
+);
+
+-- Indexes
+CREATE INDEX idx_product_ingredients_organization_id ON product_ingredients(organization_id);
+CREATE INDEX idx_product_ingredients_outlet_id ON product_ingredients(outlet_id);
+CREATE INDEX idx_product_ingredients_product_id ON product_ingredients(product_id);
+CREATE INDEX idx_product_ingredients_ingredient_id ON product_ingredients(ingredient_id);
+CREATE INDEX idx_product_ingredients_created_at ON product_ingredients(created_at);
+
+-- Unique constraint to prevent duplicate product-ingredient combinations
+CREATE UNIQUE INDEX idx_product_ingredients_unique ON product_ingredients(product_id, ingredient_id);