fix(Makefile, playbook.yml): ensure Ansible syntax-check has access to group_vars and clean up playbook formatting

- Add all group_vars/all/*.yml as extra-vars (-e @file) in Makefile syntax-check
- Use consistent quoting in playbook.yml for SOFTWARE_NAME and host_type templating

Ref: https://chatgpt.com/share/68cdee8a-4e88-800f-bf62-bed66dbbb417

Makefile

@@ -73,7 +73,7 @@ messy-test:
 	@echo "🧪 Running Python tests…"
 	PYTHONPATH=. python -m unittest discover -s tests
 	@echo "📑 Checking Ansible syntax…"
-	ansible-playbook playbook.yml --syntax-check
+	ansible-playbook -i localhost, -c local $(foreach f,$(wildcard group_vars/all/*.yml),-e @$(f)) playbook.yml --syntax-check
 
 install: build
 	@echo "⚙️  Install complete."

playbook.yml

@@ -1,10 +1,10 @@
-- name: Execute {{ SOFTWARE_NAME }} Play
+- name: "Execute {{ SOFTWARE_NAME }} Play"
   hosts: all
   tasks:
   - name: "Load 'constructor' tasks"
     include_tasks: "tasks/stages/01_constructor.yml"
-  - name: "Load '{{host_type}}' tasks"
-    include_tasks: "tasks/stages/02_{{host_type}}.yml"
+  - name: "Load '{{ host_type }}' tasks"
+    include_tasks: "tasks/stages/02_{{ host_type }}.yml"
   - name: "Load 'destructor' tasks"
     include_tasks: "tasks/stages/03_destructor.yml"
   become: true