minor db index work

sql/master_schema_rollup.sql

@@ -250,7 +250,8 @@ CREATE INDEX IF NOT EXISTS idx_notifications_user_id_created_at ON public.notifi
 CREATE TABLE IF NOT EXISTS public.store_locations (
     store_location_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
     store_id BIGINT REFERENCES public.stores(store_id) ON DELETE CASCADE,
-    address_id BIGINT NOT NULL REFERENCES public.addresses(address_id) ON DELETE CASCADE,
+    address_id BIGINT NOT NULL REFERENCES public.addresses(address_id) ON DELETE CASCADE,    
+    UNIQUE(store_id, address_id),
     created_at TIMESTAMPTZ DEFAULT now() NOT NULL,
     updated_at TIMESTAMPTZ DEFAULT now() NOT NULL
 );