fix(build): include web subscriptions in approvals aggregate deploy

The approvals Makefile's deploy target ran deploy-domain deploy-service deploy-schema deploy-contracts-subscriptions, omitting deploy-web-subscriptions. Without it, unicorn-web-subscriptions.yaml (the rule forwarding PublicationApprovalRequested from the Web bus to the Approvals bus) is never deployed, so the approval workflow's state machine never starts from a request_approval call. Added deploy-web-subscriptions to the aggregate target and documented its dependency on the Web service's domain stack (WebEventBusArn SSM parameter) for standalone use outside the full workshop deployment order.

Author: sliedig

unicorn_approvals/Makefile

@@ -92,7 +92,10 @@ delete-web-subscriptions: ## Deploy web event subscriptions
 	@aws cloudformation wait stack-delete-complete --stack-name $(STACK_PREFIX)-approvals-web-subscriptions --region $(REGION) || true
 	@echo "Done"
 
-deploy: deploy-domain deploy-service deploy-schema deploy-contracts-subscriptions ## Deploy all infrastructure and application
+# deploy-web-subscriptions depends on the Web service's domain stack (WebEventBusArn SSM
+# parameter); deploy that first if running this standalone rather than as part of the full
+# workshop deployment order.
+deploy: deploy-domain deploy-service deploy-schema deploy-contracts-subscriptions deploy-web-subscriptions ## Deploy all infrastructure and application
 
 test: ## Run tests
 	@echo "Running tests..."