fix(build): correct make lint template paths

The lint target in all three Makefiles pointed at flattened paths (infrastructure/<service>.yaml) that don't exist; the actual templates are at infrastructure/<service>-service/template.yaml. make lint always failed past the domain template. Corrected to the real path in each service.

Author: sliedig

unicorn_approvals/Makefile

@@ -107,7 +107,7 @@ lint: ## Lint Python code and CloudFormation templates
 	@uv run ruff check .
 	@uv run ruff format --check .
 	@echo "Linting CloudFormation templates..."
-	@cfn-lint infrastructure/approvals-service.yaml -a cfn_lint_serverless.rules
+	@cfn-lint infrastructure/approvals-service/template.yaml -a cfn_lint_serverless.rules
 	@cfn-lint infrastructure/domain.yaml
 	@cfn-lint infrastructure/schema-registry/PublicationEvaluationCompleted-schema.yaml
 	@cfn-lint infrastructure/subscriptions/unicorn-contracts-subscriptions.yaml

unicorn_contracts/Makefile

@@ -69,7 +69,7 @@ lint: ## Lint Python code and CloudFormation templates
 	@uv run ruff check .
 	@uv run ruff format --check .
 	@echo "Linting CloudFormation templates..."
-	@cfn-lint infrastructure/contracts-service.yaml -a cfn_lint_serverless.rules
+	@cfn-lint infrastructure/contracts-service/template.yaml -a cfn_lint_serverless.rules
 	@cfn-lint infrastructure/domain.yaml
 	@cfn-lint infrastructure/schema-registry/ContractStatusChanged-schema.yaml
 

unicorn_web/Makefile

@@ -80,7 +80,7 @@ lint: ## Lint Python code and CloudFormation templates
 	@uv run ruff check .
 	@uv run ruff format --check .
 	@echo "Linting CloudFormation templates..."
-	@cfn-lint infrastructure/web-service.yaml -a cfn_lint_serverless.rules
+	@cfn-lint infrastructure/web-service/template.yaml -a cfn_lint_serverless.rules
 	@cfn-lint infrastructure/domain.yaml
 	@cfn-lint infrastructure/schema-registry/PublicationApprovalRequested-schema.yaml
 	@cfn-lint infrastructure/subscriptions/unicorn-approvals-subscriptions.yaml